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Nonfiction Series Nonfiction
- Jungle Love: A Portfolio of Drawings by Roy G. Krenkel (1974)
- Cities & Scenes from the Ancient World (1974)
- Portfolio from The Road of Azrael (1979)
- Roy G. Krenkel: Portfolio # 1 (1980)
- Swordsmen and Saurians (1989)
- The Art of Roy G. Krenkel (1989)
- Masters of the Marvelous: Artwork by Roy G. Krenkel and Esteban Maroto (1993) with Esteban Maroto
- RGK: The Art of Roy G. Krenkel (2004) with Barry Klugerman and J. David Spurlock
- Machairodus (1974)
- Letter (ERB-dom, July 1963) (1963)
- About King Kull (1968)
- J. Allen St. John: New Discoveries About Burroughs' Most Famous Illustrator (1972) [only as by Roy Krenkel]
- Introduction (The Sowers of the Thunder) (1973)
-
Some Comments on "Doodling" — and Other Irreverent Observations?Some Comments on "Doodling" - and Other Irreverent Observations(1974)
- Letter to Bhob Stewart, February 16, 1976 (1985)
- Letter to Bhob Stewart, February 23, 1976 (1985)
- Letter to Bhob Stewart, January 20, 1076 (1985)
- Letter to Bhob Stewart, June 18, 1974 (1985)
- Letter to Bhob Stewart, March 12, 1976 (1985)
- Letter to Bhob Stewart, March 17, 1976 (1985)
- Letter to Bhob Stewart, November 20, 1973 (1985)
- Letter to Ted Dikty, April 2, 1973 (2004)
- Amra V2n15, May 1961 (1961) [only as by Roy Krenkel]
-
Amra V2n16, July 1961 (1961)
only appeared as:
- Variant: Amra V2n16, July 1961 (1961) [as by Roy Krenkel]
- Variant: Amra: v2 #16 (2020) [as by Roy Krenkel]
- Amra V2n18, December 29, 1961 (1961) [only as by Roy Krenkel]
-
The Moon Maid (1962)
only appeared as:
- Variant: The Moon Maid (1962) [as by Roy Krenkel, Jr.]
- Interior Art: The Moon Maid cover art (1962)
- Interior Art: Cover: The Moon Maid (2003)
- Interior Art: The Moon Maid (cover) (2016)
-
Thuvia, Maid of Mars (1962)
only appeared as:
- Variant: Thuvia, Maid of Mars (1962) [as by Roy Krenkel, Jr.]
- Interior Art: Thuvia, Maid of Mars (cover) (1962)
- Interior Art: Thuvia, Maid of Mars (2021) [as by Roy Krenkel]
- Amra V2n21, June 1962 (1962) [only as by Roy Krenkel]
-
At the Earth's Core (1962)
also appeared as:
- Interior Art: Ace paperback cover of "At the Earth's Core" (1962)
- Variant: At the Earth's Core (1962) [as by Roy Krenkel, Jr.]
- Interior Art: Cover: At the Earth's Core (2003)
- Interior Art: The Vengeance of Kyvor / At the Earth's Core (2013)
- Interior Art: At the Earth's Core (cover) (2016)
- Interior Art: At the Earth's Core (2020) [as by Roy Krenkel]
-
Pellucidar (1962)
also appeared as:
- Variant: Pellucidar (1962) [as by Roy Krenkel, Jr.]
- Translation: Pellucidar Cover [French] (1982) [as by Roy Krenkel]
- Interior Art: Pellucidar (cover) (2016)
-
The Cave Girl (1962)
also appeared as:
- Interior Art: The Cave Girl (cover) (1962)
-
Tanar of Pellucidar (1962)
only appeared as:
- Variant: Tanar of Pellucidar (1962) [as by Roy Krenkel, Jr.]
- Interior Art: Tanar of Pellucidar (cover) (1962)
- Interior Art: Tanar of Pellucidar (2012) [as by uncredited]
-
The Chessmen of Mars (1962)
only appeared as:
- Variant: The Chessmen of Mars (1962) [as by Roy Krenkel, Jr.]
- Interior Art: The Chessmen of Mars (cover) (1962)
- Variant: The Golden Ape (2013) [as by Roy Krenkel, Jr. and Dan Thompson]
- Land of Terror (1963)
- Planet of Peril (1963) [also as by Roy Krenkel, Jr.]
-
The Land That Time Forgot (1963)
only appeared as:
- Variant: The Land That Time Forgot (1963) [as by Roy Krenkel, Jr.]
-
Translation: Tărîmul uitat de timp?Tarimul uitat de timp[Romanian] (1973) [as by Roy Krenkel, Jr.]
- Interior Art: The Land That Time Forgot (1974)
-
The Prince of Peril (1963)
also appeared as:
- Variant: Prince of Peril (1963) [as by Roy Krenkel, Jr.]
- Interior Art: Prince of Peril (cover) (2001)
- Interior Art: Cover: Prince of Peril (2003)
- Amra V2n23, January 1963 (1963) [only as by Roy Krenkel]
-
Pirates of Venus (1963)
only appeared as:
- Variant: Pirates of Venus (1963) [as by Roy Krenkel, Jr.]
- Interior Art: Pirates of Venus (cover) (1963)
- Translation: Piraten der Venus [German] (2017)
-
The Mastermind of Mars (1963)
also appeared as:
- Interior Art: The Master Mind of Mars (1979)
- Interior Art: Cover: The Mastermind of Mars (2003)
- Interior Art: The Mastermind of Mars (cover) (2009)
- Variant: The Master Mind of Mars (2020)
-
A Fighting Man of Mars (1963)
only appeared as:
- Variant: A Fighting Man of Mars (1963) [as by Roy Krenkel, Jr.]
- Interior Art: A Fighting Man of Mars (cover) (1963)
- Variant: Pirates of Venus (1973) [as by Roy Krenkel, Jr.]
- Interior Art: Pirates of Venus (cover) (1973)
- Interior Art: Cover: A Fighting Man of Mars (2003)
-
Tarzan Triumphant (1963)
only appeared as:
- Variant: Tarzan Triumphant (1963) [as by Roy G. Krenkel, Jr.]
- Interior Art: Tarzan Triumphant (cover) (1963)
- Interior Art: Tarzan Triumphant (1979)
- Interior Art: Cover: Tarzan Triumphant (2003)
-
The People That Time Forgot (1963)
only appeared as:
- Variant: The People That Time Forgot (1963) [as by Roy Krenkel, Jr.]
- Variant: The People That Time Forgot (1969) [as by Roy G. Krenkel, Jr.]
- Interior Art: The People That Time Forgot (2003)
-
Out of Time's Abyss (1963)
also appeared as:
- Variant: Out of Time's Abyss (1963) [as by Roy Krenkel, Jr.]
- Interior Art: Out of Time's Abyss (cover) (1963)
- Variant: Out of Time's Abyss (1969) [as by Roy G. Krenkel, Jr.]
- Variant: RGK: The Art of Roy G. Krenkel (2005)
- Translation: Almuric y otros textos de ciencia ficción [Spanish] (2012)
- Interior Art: Cover art for Out of Time's Abyss (2017)
-
The Eternal Savage (1963)
also appeared as:
- Variant: The Eternal Savage (1963) [as by Roy G. Krenkel, Jr.]
- Interior Art: The Eternal Savage (cover) (1963)
- Interior Art: The Eternal Savage (cover) [2] (1963)
- Variant: The Eternal Savage (1972) [as by Roy Krenkel, Jr.]
- Interior Art: Cover art for "The Eternal Savage" (2003)
- Interior Art: Cover: The Eternal Savage (2003)
-
The Land of Hidden Men (1963)
only appeared as:
- Variant: The Land of Hidden Men (1963) [as by Roy Krenkel, Jr.]
- Interior Art: The Land of Hidden Men (cover) (1963)
- Interior Art: The Land of Hidden Men (cover - 1963 Ace Books) (1973)
- Interior Art: Cover art for "The Land of Hidden Men" (2003)
- Interior Art: Cover: The Land of Hidden Men (2003)
- Variant: RGK: The Art of Roy G. Krenkel (2005)
-
Back to the Stone Age (1963)
with
Frank Frazetta
also appeared as:
- Variant: Back to the Stone Age (1963) [as by Frank Frazetta and Roy Krenkel, Jr.]
- Interior Art: Back to the Stone Age (cover) (2016) [as by Roy G. Krenkel]
-
Amra V2n27, November 16, 1963 (1963)
only appeared as:
- Variant: Amra V2n27, November 16, 1963 (1963) [as by Roy Krenkel]
- Variant: Swordsmen and Saurians (1989)
- Interior Art: Cover: Swordsmen and Saurians (2003)
-
Tarzan and the Tarzan Twins (1963)
also appeared as:
- Interior Art: Tarzan and the Tarzan Twins (cover) (1963)
-
Escape on Venus (1964)
only appeared as:
- Variant: Escape on Venus (1964) [as by Roy Krenkel, Jr.]
- Interior Art: Escape on Venus (cover) (1964)
-
The Port of Peril (1964)
also appeared as:
- Variant: The Port of Peril (1964) [as by Roy G. Krenkel, Jr.]
- Interior Art: Cover: The Port of Peril (2003)
-
The Cave Girl (1964)
also appeared as:
- Interior Art: The Cave Girl (cover) (1964)
- Variant: The Cave Girl (1969) [as by Roy Krenkel, Jr.]
- Interior Art: Cover: The Cave Girl (2003)
-
Tales of Three Planets (1964)
also appeared as:
- Interior Art: Tales of Three Planets (cover) (1964)
- Interior Art: Tales of Three Planets (cover) (1972)
- Interior Art: Cover: Tales of Three Planets (2003)
- Interior Art: Tales of Three Planets (cover) (2016) [as by Roy Krenkel]
- Amra V2n31, December 1964 (1964)
-
The Wonderful Wizard of Oz (1965)
only appeared as:
- Variant: The Wonderful Wizard of Oz (1965) [as by Roy Krenkel]
- Interior Art: The Wonderful Wizard of Oz (cover) (2001)
- Interior Art: Cover: The Wonderful Wizard of Oz (2003)
- Amra V2n32, March 1965 (1965) [only as by Roy Krenkel]
- Amra V2n36, September 1965 (1965)
-
Creepy, February 1966 (1966)
with
Frank Frazetta
only appeared as:
- Interior Art: Creepy, No. 7 (cover) (2020) [as by Frank Frazetta and Roy Krenkel]
- Amra V2n42, September 1966 (1966) [only as by Roy Krenkel]
-
Highways in Hiding (1967)
also appeared as:
- Interior Art: Cover: Highways in Hiding (2003)
-
King Kull (1967)
also appeared as:
- Interior Art: The Fantastic Worlds of Robert E. Howard [5] (1997)
- Interior Art: The Robert E. Howard Newsletter, V2n1 [2] (1998)
- Interior Art: King Kull (cover) (2001)
- Interior Art: Cover art for "King Kull" (2003)
- Interior Art: The Howard Review, October 2008 (2008)
- Interior Art: Cover for King Kull (2017)
-
The Dragon of the Ishtar Gate (1968)
also appeared as:
- Interior Art: Cover: The Dragon of the Ishtar Gate (2003)
- Amra V2n46, April 1968 (1968)
- Amra V2n47, August 1968 (1968)
- Amra V2n49, August 1968 (1968)
-
The Outlaw of Torn (1968)
only appeared as:
- Variant: The Outlaw of Torn (1968) [as by Roy Krenkel, Jr.]
- Interior Art: The Outlaw of Torn cover art (1999)
- Interior Art: The Outlaw of Torn (cover) (2016)
- ERB-dom: A Guide to Issues Nos. 1-25 & Supplements (1969)
- Amra V2n51, November 1969 (1969) [only as by Roy Krenkel]
- Amra V2n52, April 1970 (1970)
-
The Wizard of Venus (1970)
only appeared as:
- Variant: The Wizard of Venus (1970) [as by Roy G. Krenkel, Jr.]
- Interior Art: The Wizard of Venus (cover) (1970)
- Interior Art: The Wizard of Venus (cover) (2016) [as by Frank Frazetta]
- Variant: The Resurrection of Jimber-Jaw (2022)
- Amra V2n54, April 1971 (1971)
- Amra V2n55, December 1971 (1971)
- ERB-dom, May 1972 (1972) [only as by Roy Krenkel]
- Amra V2n57, June 1972 (1972)
-
The Sowers of the Thunder (1973)
also appeared as:
- Interior Art: The Howard Review, October 2008 [2] (1973)
- Interior Art: The Sowers of the Thunder (cover - 1973 Donald M. Grant) (1973)
- Interior Art: Cover: The Sowers of the Thunder (2003)
- Amra V2n58, January 1973 (1973)
- Amra V2n60, September 1973 (1973)
- Cities & Scenes from the Ancient World (1974)
- Jungle Love: A Portfolio of Drawings by Roy G. Krenkel (1974)
-
Cross Plains V1n1, January 1974 (1974)
also appeared as:
- Interior Art: The Howard Review, January 1991 [4] (1974)
-
Cross Plains V1n3, March 1974 (1974)
also appeared as:
- Interior Art: The Howard Review, January 1991 (Cover illustration of "Cross Plains #3) (1974)
-
Hadon of Ancient Opar (1974)
only appeared as:
- Variant: Hadon of Ancient Opar (1974) [as by Roy Krenkel]
- Translation: Magira, #32 [German] (1979)
- Translation: Magira #33 [German] (1980)
- Interior Art: Hadon of Ancient Opar (cover) (2001)
-
By the Light of the Green Star (1974)
only appeared as:
- Variant: By the Light of the Green Star (1974) [as by Roy Krenkel]
- Translation: Im Licht des grünen Sterns [German] (1975) [as by Roy Krenkel]
- Amra V2n62, October 1974 (1974)
- As the Green Star Rises (1975) [only as by Roy Krenkel]
- The Illustrators of R. E. H. / Roy G. Krenkel (1975)
- Dark Phantasms, Summer 1976 (1976) also appeared as:
- Ironcastle (1976) [only as by Roy Krenkel]
- Amra V2n65, April 1976 (1976) with Philip Hawkins [only as by Phil Hawkins and Roy G. Krenkel]
- Amra V2n66, April 1976 (1976)
- Flight to Opar (1976) [only as by Roy Krenkel]
- Ophemera (1977)
- Amra V2n67, February 1977 (1977)
- Weirdbook Eleven (1977)
- Amra V2n68, July 1978 (1978)
- Burroughs Artist Roy G. Krenkel (1979)
-
The Road of Azrael (1979)
also appeared as:
- Interior Art: Road of Azrael (2003) [as by Roy Krenkel]
- Interior Art: Road to Azreal (2020) [as by Roy Krenkel]
- Roy G. Krenkel: Portfolio # 1 (1980)
- Fantasy Newsletter, No. 22 March 1980 (1980)
-
Fantasy Newsletter, No. 26 July 1980 (1980)
also appeared as:
- Variant: The Barbarian Scroll, #10 November 1989 (1989)
- Fantasy Newsletter, No. 29 October 1980 (1980)
- Amra V2n69, January 1981 (1981)
- Amra V2n70, September 1981 (1981)
- Celtica Notes (1986)
- The Art of Roy G. Krenkel (1989)
- The Blufftown Barbarian, #4 February 1993 (1993)
- The Howard Review, Spring 1995 (1995)
-
Blufftown Barbarian, #6 February 2001 (2001)
also appeared as:
- Variant: Robert E. Howard: World's Greatest Pulpster Number One (2001)
- Variant: The Howard Review, October 2008 (2008)
- The Fiction of Robert E. Howard: A Quick Reference Guide (2006)
- Tarzan of the Apes & Other Tales: Centenary Edition (2012)
- Roy G. Krenkel: Father of Heroic Fantasy: A Centennial Celebration (2019)
- Precedent (1952) [only as by Roy Krenkel]
- Time Was (1952) [also as by uncredited]
- The Hour of Battle (1953) [only as by Krenkel]
- De Demon- Natur- (1953) [only as by Krenkel]
- The Stronger Spell (1953) [only as by Krenkel]
- The Prodigy (1954) [only as by Krenkel]
- Rain Check (1954) [also as by Krenkel]
- "Ambuscade" (1961) [only as by Roy Krenkel]
- Amra V2n15, May 1961 (1961) [only as by Roy Krenkel]
- Death and the Senator (1961) [only as by Krenkel]
- Death and the Senator [2] (1961) [only as by Krenkel]
- Death and the Senator [3] (1961) [only as by Krenkel]
- Gone Fishing [2] (1961) [only as by Krenkel]
- Gone Fishing [3] (1961) [only as by Krenkel]
-
Gone Fishing [4] (1961)
only appeared as:
- Variant: Gone Fishing (1961) [as by Krenkel]
- Variant: Gone Fishing (1961)
- Variant: Gone Fishing [4] (1961) [as by Krenkel]
- Gone Fishing [5] (1961) [only as by Krenkel]
- Gone Fishing [6] (1961) [only as by Krenkel]
- Amra V2n16, July 1961 (1961) [only as by Roy Krenkel]
- Conan and Matho (1961) [only as by Roy Krenkel]
- Amra V2 n17, October 1961 (1961) [only as by Roy Krenkel]
- The New Ship (1961) [only as by Roy Krenkel]
- A Problem in Communication (1961) [only as by Krenkel]
-
Attrition [2] (1961)
only appeared as:
- Variant: Attrition (1961) [as by Krenkel]
- Variant: Attrition (1961)
- Variant: Attrition [2] (1961) [as by Krenkel]
- Attrition [3] (1961) [only as by Krenkel]
-
No Small Enemy (1961)
also appeared as:
- Variant: No Small Enemy (1961) [as by Krenkel]
- Variant: No Small Enemy [2] (1961) [as by Krenkel]
- No Small Enemy [3] (1961) [only as by Krenkel]
- No Small Enemy [4] (1961) [only as by Krenkel]
- No Small Enemy [5] (1961) [only as by Krenkel]
- Sleight of Wit (1961) [only as by Krenke]
-
Sleight of Wit [2] (1961)
only appeared as:
- Variant: Sleight of Wit [2] (1961) [as by Krenke]
- Variant: Slight of Wit (1961)
- Otherworld Scenes (1961) [only as by Roy Krenkel]
-
At the Earth's Core (title page) (1962)
only appeared as:
- Variant: At the Earth's Core (title page) (1962) [as by Roy Krenkel, Jr.]
- Variant: At the Earth's Core (title page) (1962) [as by Roy Krenkel, Jr.]
- Pellucidar (title-page) (1962) [only as by Roy Krenkel, Jr.]
- Tanar of Pellucidar (title page) (1962) [only as by Roy Krenkel, Jr.]
-
The Chessmen of Mars (title page illustration) (1962)
only appeared as:
- Variant: The Chessmen of Mars (title page) (1962) [as by Roy Krenkel, Jr.]
- The Moon Maid (1962) [only as by Roy Krenkel, Jr.]
-
Thuvia, Maid of Mars (1962)
only appeared as:
- Variant: Thuvia, Maid of Mars (title page) (1962) [as by Roy Krenkel, Jr.]
- Amra V2n19, February 1961 (1962) [only as by Roy Krenkel]
- His Master's Voice [2] (1962) [only as by Krenkel]
- His Master's Voice [3] (1962) [only as by Krenkel]
- His Master's Voice [4] (1962) [only as by Krenkel]
-
His Master's Voice [5] (1962)
only appeared as:
- Variant: His Master's Voice (1962) [as by Krenkel]
- Variant: His Master's Voice (1962)
- Variant: His Master's Voice [5] (1962) [as by Krenkel]
- His Master's Voice [6] (1962) [only as by Krenkel]
-
The Iron Jackass (1962)
also appeared as:
- Variant: The Iron Jackass (1962) [as by Krenkel]
- Variant: The Iron Jackass [2] (1962) [as by Krenkel]
- Conan's Imitators (1962) [only as by Roy Krenkel]
-
Look Before You Leap (1962)
only appeared as:
- Variant: Before You Leap [2] (1962)
- Variant: Look Before You Leap (1962) [as by uncredited]
-
Look Before You Leap [4] (1962)
only appeared as:
- Variant: Before You Leap (1962)
- Variant: Look Before You Leap [4] (1962) [as by uncredited]
- Treasure beyond Measure (1962) [only as by Roy Krenkel]
- A Puzzle (1962) [only as by Roy Krenkel]
- Amra V2n22, July 1962 (1962) [only as by Roy Krenkel]
- Blunders (Amra V2n22, July 1962) (1962) with Gray Morrow [only as by Roy Krenkel and Gray Morrow]
- Letter: On Barsoom (1962) [only as by Roy Krenkel]
- Letter: On Conan and Hollywood (1962) [only as by Roy Krenkel]
- Letter: On Heroes (1962) [only as by Roy Krenkel]
- Scrolls & Such (Amra V2n22, July 1962) (1962) [only as by Roy Krenkel]
- Weapons of Choice (1962) with Frank Frazetta [only as by Frank Frazetta and Roy Krenkel]
- At the Earth's Core (1962)
- The Moon Men (1962)
- A great Hairy Brute of a man (1962)
-
Nadara (1962)
also appeared as:
- Variant: The Cave Girl (1979)
-
Part way up the cliffs, she paused to look back (1962)
also appeared as:
- Variant: The Cave Girl [3] (1979)
-
She gave a little scream, and started to run (1962)
also appeared as:
- Variant: The Cave Girl [2] (1979)
-
The wild boars—were hunted now?The wild boars-were hunted now(1962) also appeared as:
- Variant: The Cave Girl [4] (1979)
- With him went Nagoola (1962)
-
Tanar of Pellucidar (1962)
only appeared as:
- Variant: Tanar of Pellucidar (title page) (1962) [as by Roy Krenkel, Jr.]
-
1963 — Pirates of Venus by Edgar Rice Burroughs?1963 - Pirates of Venus by Edgar Rice Burroughs(1963) [only as by Roy Krenkel]
- A Fighting Man of Mars (1963) [only as by Roy Krenkel, Jr.]
- Land of Terror (1963)
-
Pirates of Venus (1963)
only appeared as:
- Variant: Pirates of Venus (unknown) [as by Roy Krenkel, Jr.]
- Variant: Pirates of Venus (title page) (1963) [as by Roy Krenkel, Jr.]
-
Planet of Peril (1963)
only appeared as:
- Variant: Planet of Peril (title page) (1963) [as by Roy Krenkel, Jr.]
- Prince of Peril (title page) (1963) [only as by Roy Krenkel, Jr.]
- Tarzan and the Tarzan Twins (1963)
- Tarzan Triumphant (1963) [only as by Roy G. Krenkel, Jr.]
- The Land That Time Forgot (title page) (1963) [only as by Roy Krenkel, Jr.]
- The Mastermind of Mars (frontispiece) (1963)
-
The People That Time Forgot (title page) (1963)
only appeared as:
- Variant: The People That Time Forgot (title page) (1963) [as by Roy Krenkel, Jr.]
- Variant: The People That Time Forgot (title page) (1963) [as by Roy G. Krenkel, Jr.]
- The Reader's Guide to Barsoom and Amtor (1963)
-
"Old Aquilonia No. 1: Side entrance to the palace of Numedides" (1963)
also appeared as:
- Variant: "Old Aquilonia No. 1: Side entrance to the palace of Numedides" (1963) [as by Roy Krenkel]
- Translation: Magira #17 (cover) [German] (1974)
- "Study of the Creodant Patriofelis for the Eocene Scene" (1963) [only as by Roy Krenkel]
- Amra V2n23, January 1963 (1963) [only as by Roy Krenkel]
- "Forest Scent ~ Oligocene Period" (1963) [only as by Roy Krenkel]
- Amra V2n25, June 1963 (1963) [only as by Roy Krenkel]
-
Out of Time's Abyss (title page) (1963)
only appeared as:
- Variant: Out of Time's Abyss (1963) [as by Roy G. Krenkel, Jr.]
- Variant: Out of Time's Abyss (title page) (1963) [as by Roy Krenkel, Jr.]
- Pellucidar (1963) [only as by Roy G. Krenkel, Jr.]
- The Eternal Savage (title page) (1963) [only as by Roy G. Krenkel, Jr.]
-
The Land of Hidden Men (frontispiece) (1963)
only appeared as:
- Variant: The Land of Hidden Men (title page) (1963) [as by Roy Krenkel, Jr.]
- Back to the Stone Age (title page) (1963) with Frank Frazetta [also as by Frank Frazetta and Roy Krenkel, Jr.]
-
"I will admit she did not look crazy." (1963)
also appeared as:
- Variant: "I will admit she didn't look crazy." (1963)
- Variant: Land of Terror [3] (1979)
-
"Quick," I cried, "Mount the thing!" (1963)
also appeared as:
- Variant: "Quick," I cried to Zor... "Mount the thing!" (1963)
- Variant: Land of Terror [2] (1979)
-
Armed only with stone knives, they faced the two great brutes (1963)
also appeared as:
- Variant: Armed only with stone knives, they were hopelessly facing the two great brutes. (1963)
- Variant: Land of Terror [4] (1979)
- As he went by I plunged my knife between his ribs (1963)
-
I walked slowly toward them (1963)
also appeared as:
- Variant: Land of Terror (1979)
- I was directly in the path of the beast as it charged. (1963)
- It sprang high into the air after me (1963)
- Once more I set to work to fabricate a bow (1963)
- Amra V2n27, November 16, 1963 (1963) [only as by Roy Krenkel]
- "Can't We Escape, Ukundo?" (1963)
- Escape on Venus (title page) (1964) [only as by Roy Krenkel, Jr.]
-
The Port of Peril (1964)
only appeared as:
- Variant: The Port of Peril (frontispiece) (1964) [as by Roy G. Krenkel, Jr.]
- The Cave Girl (title page) (1964) [only as by Roy Krenkel, Jr.]
- "He was across that room in two strides." (1964)
- "Here in Kapara all is suspicion and fear." (1964)
-
"I let him have it straight in the heart." (1964)
also appeared as:
- Variant: Tales of Three Planets (1979)
- "I spent a full week studying the plans and examining the small model." (1964)
-
"I was sent back to the engine factory." (1964)
also appeared as:
- Variant: Tales of Three Planets [2] (1979)
- "Out of that vast garden rose buildings." (1964)
- "Stade injected an ounce and a half of anterior pituitary fluid." (1964)
-
"The girl stopped and turned about." (1964)
also appeared as:
- Variant: Tales of Three Planets [3] (1979)
-
"Then he ran to the edge and jumped." (1964)
also appeared as:
- Variant: Tales of Three Planets [4] (1979)
- "We passed over some very beautiful country." (1964)
- "The Hidden Valley" (1964) [only as by Roy Krenkel]
- Review: The Serpent (1964) [only as by Roy Krenkel]
- Escape Literature (1964) [only as by Roy Krenkel]
- Letters: REH (Amra V2n29, August 1964) (1964) [only as by Roy Krenkel]
- The Beasts of Tarzan (1964)
- "The Prophet" (1964)
- A Pair of Scrolls (1964)
- Amra V2n31, December 1964 (1964) [only as by Roy Krenkel]
- Thuds (Amra V2n31, December 1964) (1964)
- Subspace Explorers (frontispiece) (1965)
- The Wonderful Wizard of Oz (1965) [only as by Roy Krenkel]
- Amra V2n32, March 1965 (1965) [only as by Roy Krenkel]
- Requiem (1965)
- Review: The Knight and the Umbrella (1965)
-
And As to the Admixture of Cultures on Imaginary Worlds .... (1965)
only appeared as:
- Variant: And As to the Admixture of Cultures on Imaginary Worlds .... (1965) [as by R. G. Krenkel]
- Variant: ... And as for the Admixture of Cultures on Imaginary Worlds (1969) [as by Roy Krenkel]
- Blunders (Amra V2n33, April 1965) (1965) [only as by R. G. Krenkel]
- On an Ancient Amra (1965) [only as by R. G. Krenkel]
-
Range (1965)
only appeared as:
- Variant: Range (1965) [as by R. G. Krenkel]
- Variant: Range (1969) [as by Roy Krenkel]
-
Ranging Afterthoughts (1965)
only appeared as:
- Variant: Ranging Afterthoughts (1965) [as by R. G. Krenkel]
- Variant: Ranging Afterthoughts (1969) [as by Roy Krenkel]
- How to Build a World (1965) with James Cawthorn [only as by Jim Cawthorn and Roy Krenkel]
- The Curved Saber (1965) [only as by Roy Krenkel]
- Zen Combat (1965) [only as by Roy Krenkel]
- Pratt's Parallel Worlds (1965) with Rafael Palacios [only as by Roy Krenkel and Rafael Palacios]
- The Twilight of the Gods and Other Tales (1965)
- Tikal (1965)
- Foldish Look-Well (1966)
- Review: Gulliver of Mars (1966)
- Swackles (Amra V2n36, January 1966) (1966) with Dan Adkins
- Thuds (Amra V2n36, January 1966) (1966)
- A Glossary of the Names and Terms Used in ... The Pellucidar Books (1966) [only as by Roy Krenkel]
- ERB-dom, February 1966 (1966)
- Memories of R. E. H. (1966)
- Pellucidar: The Perfect Paradox (1966) [only as by Roy Krenkel]
- "Idea Fragment: Thunder" (1966)
- "Smilodon Californicus" (1966)
- Letters: REH (Amra V2n39, March 1966) (1966) [only as by Roy Krenkel]
- The Pike (1966) [only as by Roy Krenkel]
- The Gods of Neol-Shendis (1966) [only as by Roy Krenkel]
- "B.C. 54: The Library at Alexandria" (1966) [only as by Roy Krenkel]
- A Further Note on Edwin Edgar Lester Rice Arnold Burroughs (1966) [only as by Roy Krenkel]
- Multiple Scroll (1966) [only as by Roy Krenkel]
- Rescue (1966) [only as by Roy Krenkel]
- Some Notes on the Problem of the Source of Ancient Barsoom (1966) [only as by Roy Krenkel]
- Amra V2n43, March 1967 (1967)
- Lars Porsena & Company (1967)
- Letter: On Nomenclature (1967)
- Meroę (1967)
- Review: Maps of the Ancient Sea Kings (1967)
- Review: Thief of Llarn (1967)
- Sondar's Chronicler: The Genius of Sanford M. Hoase (1967)
- Kaziranga, Assam (1967) [only as by Roy Krenkel]
- More Multiple Scrolls (1967) [only as by Roy Krenkel]
- Review: Tarzan and the Valley of Gold (1967) [only as by Roy Krenkel]
- "I Am a Barbarian": An Art Folio (1967)
- "Pterandon Watch" (1967) [only as by Roy Krenkel]
- "St Ry Centaur (out hunting)" (1967) [only as by Roy Krenkel]
- More Swackles (Amra V2n45, December 1967) (1967) [only as by Roy Krenkel]
- Nahr Al-Kalb (1967) [only as by Roy Krenkel]
- Superaddendum to the Exegesis (1967) [only as by Roy Krenkel]
- Tharkic Riflery (1967) [only as by Roy Krenkel]
- The Trail of Tranicos (1967) [only as by Roy Krenkel]
- The Conan Reader (1968)
- The Moon Maid (title page) (1968) [only as by Roy Krenkel, Jr.]
- Barsoom (and Amtor) Pre Visited (1968)
- I Am a Barbarian (1968)
- Phoenix Prime ~ & the Books of Qar (1968) with Jack Gaughan
- Review: Phoenix Prime (1968)
- Review: The Sorceress of Qar (1968) [only as by Roy Krenkel]
- Tarzan and the Golden Lion (cover sketch) (1968)
- "Archery Lesson" (1968)
- "Satyrs Fighting" (1968)
- Amra V2n47, August 1968 (1968)
- Of Worms & Unicorns (1968)
- Plain Swackles (1968)
- Pulp Race (1968)
- Review: Eyes of the Overworld (1968)
- The Legion (1968)
- The Slag-Heaps of Meroë (1968)
- Thuds (Amra V2n48, August 1968) (1968) with Paul Gerrior [only as by Paul Gerrior and Roy Krenkel]
- What Really Happened (1968)
- The Outlaw of Torn (title page) (1968) [only as by Roy Krenkel, Jr.]
- A Gent from Cross Plains (1969) [only as by Roy Krenkel]
- Conan of the Khyber Rifles (1969) [only as by Roy Krenkel]
- Editing Conan (1969) [only as by Roy Krenkel]
- Hyborians, Be Seated (1969) [only as by Roy Krenkel]
- Letter to August Derleth (1969) [only as by Roy Krenkel]
- Letter to Harold Preece (1969) [only as by Roy Krenkel]
- Swords and Sorcery (1969) [only as by Roy Krenkel]
- The Art of Robert Ervin Howard (1969) [only as by Roy Krenkel]
- The Novels of Eric Rücker Eddison (1969) [only as by Roy Krenkel]
- Weapons of Choice (1969) [only as by Roy Krenkel]
- Who Were the Ćsir? (1969) [only as by Roy Krenkel]
- Swackles (Amra V2n50, May 1969) (1969)
- A ROYal Map of Barsoom (1969)
- A ROYal Map of Barsoom [2] (1969)
- A ROYal Map of Barsoom [3] (1969)
- An Exegesis of Names Discarded by REH (1969) [only as by Roy Krenkel]
- Monkey-Man Ape-Man (1969) [only as by Roy Krenkel]
- On Dinosaurs and Dragons (1969) with Tim Kirk [only as by Tim Kirk and Roy Krenkel]
- Review: A Voyage to Atlantis (1969) [only as by Roy Krenkel]
- First Comments .... (1969) [only as by Roy Krenkel]
- Let's Drink to That (1970)
- Reality #1 (1970)
- "The Palace of Minos from the Village Below" (1970)
- AmerIndiaNames (1970)
- Brunner's Limericks (1970)
- Letter: Barsoomian Antecedents (1970)
- Multiple Scrolls (Amra V2n52, April 1970) (1970)
- On Coats of Arms (1970)
- S&S Scrolls (1970)
- Salgari (1970)
- "A Vendor of Household Gods - Old Athens" (1970)
- "Athens - The Acropolis from a Point above the Agora" (1970)
- Swackles (Amra V2n53, September 1970) (1970)
-
1971 — Thuvia, Maid of Mars by Edgar Rice Burroughs?1971 - Thuvia, Maid of Mars by Edgar Rice Burroughs(1971) [only as by Roy Krenkel]
- "An Encounter with the Great Saber-Toothed Pussy-Cat - Smilodon Idioticus - B. C. 20,000" (1971)
- "Babylon - (the Bride Market)" (1971)
- "Idea Fragment for 'A Purchase of Carpets A. D. 25 - Alexandria" (1971)
- "The Street of Khamon near the Old North Gate - Carthage in the Days of Hamilcar" (1971)
- Multiple Scrolls (Amra V2n54, April 1971) (1971)
- Sondar (1971)
- Swackles (Amra V2n54, April 1971) (1971)
- The Wizard of Venus (preliminary oil idea) (1971)
- "Baghdad - View of the 'Round City' from the Tigris" (1971)
- "The Place of the Shoggoths" (1971)
- August Derleth 1909-1971 (1971)
- Scrolls (Amra V2n55, December 1971) (1971)
- A Furthest Note on the Red Planet (1972)
- A Man Named John (1972)
- Colour Your Dreams (1972)
- Eddison's Zimiamvian Trilogy (1972)
- Great Cities of the Ancient World (1972)
- Introduction: Swordsmen and Sorcerers at Play (1972)
- Of Worms and Unicorns (1972)
- Richard the Lion Hearted Is Alive and Well in California (1972)
- The Conan Grimoire (frontispiece) (1972)
- The Loss of a Son (1972)
- Transposition (1972)
- "Construction of a Temple - Karnak" (1972)
- "Loot" (1972)
- "Piracy" (1972)
- "The Bride-Market - Babylon" (1972)
- "The Change of Guard - Inner Gate - Byblos" (1972)
- Man about Tarantia (1972)
- More on Sondar (1972)
- Short Scrolls (Amra V2n56, June 1972) (1972) with Alicia Austin and Jack Gaughan and L. J. Spaulding
- The Real Hyborean Age (1972)
- Perigee #1 (Tarzan and Jad-bal-ja) (1973)
- The Sowers of the Thunder (1973)
- Rearming the Incomplete Enchanter (1973)
- The Wizard of Venus (title page) (1973) [only as by Roy G. Krenkel, Jr.]
- "Procession of a Consul - En Route to the Palace of Assurbanipal - Nineveh (1973)
- Another Chronology (1973)
- Barbarians I Have Known (1973)
- "Group Idea for 'Sorcery'" (1973)
- Limericks˛ (Amra V2n60, September 1973) (1973)
- Scrolls (Amra V2n60, September 1973) (1973)
- A Minoan Lady (1974)
- A Princess of Mars (1974)
- Cave Girl (1974)
- Chastity (1974)
- Cross Plains V1n5 (1974)
- Girls of the Stone Age (1974)
- La of Opar (1974)
- Mr. Weird Tales (1974) [only as by Roy Krenkel]
- Mr. Weird Tales [2] (1974) [only as by Roy Krenkel]
- Primitive Dawn (1974)
- Reclining Nude (1974)
- Sketch for a Minoan Lady (1974)
- Stern Mistress (1974)
- The Treasure (1974)
- Wild One (1974)
- Cross Plains V1n1 (1974)
- La and a Beast Man (1974) with J. Allen St. John
- "Idea for a Conan Illo" (1974)
- Aurora, March 1974 (1974) [only as by Roy Krenkel]
- Aurora, March 1974 [2] (1974) [only as by Roy Krenkel]
- Aurora, March 1974 [3] (1974) [only as by Roy Krenkel]
- Conan & the 11,000 Virgins (1974) with Harry Douthwaite
- Conan the Existentialist (1974)
- Cross Plains V1n2 (1974)
- Cross Plains V1n2 [2] (1974)
- Machairodus (1974)
- Swackles (Amra V2n61, March 1974) (1974)
- Thuds (Amra V2n61, March 1974) (1974)
-
Hadon of Ancient Opar (1974)
only appeared as:
- Variant: Hadon of Ancient Opar (1974) [as by Roy Krenkel]
- Variant: Hadon of Ancient Opar (maps) (1974) [as by Roy Krenkel]
- By the Light of the Green Star (1974) [only as by Roy Krenkel]
- Cross Plains V1n4 (1974)
- Cross Plains V1n4 [2] (1974)
- "A Quiet Day in Old Pellucidar" (1974)
- "Russian Cave Man Book Cover" (1974)
- "The Dancer from Atlantis" (1974)
- A Tentative Bibliography of S&S (1974)
- Review: Watership Down (1974)
- Tarzan, Kull, & Conan (1974)
- Thuds (Amra V2n62, October 1974) (1974)
- "Boys Life" (1975)
- A Word from Our Sponsor (REH: Lone Star Fictioneer, Summer 1975) (1975) [only as by Roy Krenkel]
- Preparing for a Science-Fiction Career (1975)
- REH: Lone Star Fictioneer, Fall 1975 (The Siege of Venarium) (1975)
- REH: Lone Star Fictioneer, Spring 1975 (1975)
- REH: Lone Star Fictioneer, Summer 1975 (1975) [only as by Roy Krenkel]
- The Colossus at Rhodes: The Harbor from Inside the Old Wall (1975) only appeared as:
- The Loser (1975)
-
The Miscast Barbarian (Conan) (1975)
also appeared as:
-
Variant: 1975 — Conan the Conqueror by Robert E. Howard?1975 - Conan the Conqueror by Robert E. Howard(1978) [as by Roy Krenkel]
-
Variant:
-
As the Green Star Rises (1975)
with
Michael Kaluta
only appeared as:
- Variant: As the Green Star Rises (1975) [as by Michael Kaluta and Roy Krenkel]
- Variant: As the Green Star Rises (1975) [as by Michael Kaluta and Roy G. Krenkel, Jr.]
- "Old Time Steamroller" (1975)
- "Old Wharf" (1975)
- "Waiting Rider" (1975)
- Fantasy Crossroads, August 1975 [6] (1975)
- Ramparts of Zingara (1975)
- The Illustrators of R. E. H. / Roy G. Krenkel (1975)
- "Three Kings" (1975)
- Cold Steel: Eyeball to Eyeball (1975) with Harry Douthwaite
- Introduction to the Second Edition (The Howard Review (second edition), October 1975) (1975)
- Limericks (Amra V2n64, October 1975) (1975)
- The Howard Review (second edition), October 1975 (1975)
- The Howard Review (second edition), October 1975 [2] (1975)
- Fantasy Crossroads, November 1975 (1975)
- Dark Phantasms, Summer 1976 (1976)
- Editorial: Up from the Pits (1976)
-
The Fall of Edessa (1976)
also appeared as:
- Variant: Interior plate from "Sowers of the Thunder" (2003)
- The Sack of Jerusalem (1976)
- The Siege of Vienna (1976)
- The Sowers of the Thunder (frontispiece) (1976)
- The Tatar Elephants (1976)
- The Howard Review Newsletter #4 (1976)
- Ironcastle (1976) [only as by Roy Krenkel]
- "Allosaurus" (1976)
- Kingdoms of Sorcery (1976)
- The Enquiries of Doctor Eszterhazy (1976)
- The Howard Review Newsletter #5 (1976)
- The Howard Review Newsletter #5 [2] (1976)
- Thuds (Amra V2n66, April 1976) (1976) with Lin Carter and Frank Frazetta and Robert E. Gilbert and Jeff Jones and Wayne McDonald and Dennis N. Smith and Angelo Torres
- Dark Fantasy, May 1976 (1976)
- Balik #1 ("Conan in Aquilonia") (1976)
- Flight to Opar (1976) [only as by Roy Krenkel]
- The Robert E. Howard Newsletter #7 (1976)
- Dark Fantasy, September 1976 (1976)
- Barsoom: Edgar Rice Burroughs and the Martian Vision (1976)
- Heroes of R E H: Solomon Kane (1976)
- Ultima Thule, Installment 2 (1976)
- Krenkel Cuts (1977)
- Dark Fantasy, January 1977 (centerfold) (1977) with Gene Day and Tim Hammell and Greg Vander Leun and Jim McLeod and Tony Salmons
- An Informal Interview with Conan the Cimmerian (1977)
- Scrolls (Amra V2n67, February 1977) (1977)
- Stirrups & Scholarship (1977)
- Thuds (Amra V2n67, February 1977) (1977)
- Fantasy Crossroads, March 1977 [4] (1977)
- Fantasy Crossroads, March 1977 [6] (1977)
- Hero (1977)
- Isaac Asimov's Science Fiction Magazine, Summer 1977 (1977)
- Solomon and Sorcery (1977)
- The Howard Review, April 1977 (1977)
- The Howard Review, April 1977 [2] (1977)
- On the Martian Problem (1977)
- On the Martian Problem [2] (1977)
- Wolf Tracks (1978)
- Amra V2n68, July 1978 (1978)
- Bearslayer: The Latvian Epic (1978)
- Conan the Limmerian (1978)
- Faust's Swordsmen (1978)
- Scrolls (Amra V2n68, July 1978) (1978)
- Thuds (Amra V2n68, July 1978) (1978)
- Die phantastische Bibliothek (Magira #31) [7] [German] (1978)
- Borealis 2, Spring 1979 (1979) [only as by Roy Krenkel]
- Burroughs Artist Roy G. Krenkel (1979)
- Speak, Great Tur, ere I strike (1979)
- Tarzan and the Tarzan Twins (1979)
- Tarzan and the Tarzan Twins [2] (1979)
- Tarzan and the Tarzan Twins [3] (1979)
- Tarzan and the Tarzan Twins [4] (1979)
- Tarzan and the Tarzan Twins [5] (1979)
- Tarzan and the Tarzan Twins [6] (1979)
- The Road of Azrael (1979)
- The Road of Azrael front endpapers (1979)
- A Time for Terror [3] (1979) [only as by Roy G. Krenkel, Jr.]
- Heroic Fantasy (frontispiece) (1979)
- Letters (Asimov's, April 1979) (1979) [only as by Roy G. Krenkel, Jr.]
- "He is a lion who but sleeps." (1979)
- ... sitting his white stallion in the midst of his emirs ... (1979)
- A street-riot (1979)
- Giles and the Courtesan (1979)
- The camp of the Crusaders (1979)
- The Conquerers (1979)
- Die phantastische Bibliothek (Magira #32) [2] [German] (1979)
- Die phantastische Bibliothek (Magira #32) [3] [German] (1979)
- Letters (Asimov's, November 1979) (1979) [only as by Roy G. Krenkel, Jr.]
- Roy G. Krenkel: Portfolio # 1 (1980)
- The Year's Best Fantasy Stories: 5 (frontispiece) (1980)
- Dark Fantasy, March 1980 (centerfold) (1980) with John Bierley and Dan Day and George Freeman and Ken Raney and uncredited
- Vale of the Emerald Poppy (1980)
- Solomon and Sheba (1980) [only as by Roy Krenkel]
- "A Quiet Day in Old Pellucidar No. 2" (1981)
- "Forgotten Lore: Idea Sketch" (1981)
- "Layout for A Street Riot - Cairo" (1981)
- "Samarkand" (1981)
- "The Magic Circle" (1981)
- A True Hero: Richard Coeur de Leon, by Grace of God, King of France and England (1981)
- More Stirrups (1981)
- Pytheas of Marseilles Tells of a Kraken (1981)
- The Conan Film - A Status Report (1981)
- The Pretenses of Hinyar (1981) with Derek Carter
- Thuds (Amra V2n69, January 1981) (1981)
- Gold! (1981)
- Daystar and Shadow (1981) [only as by Roy G. Krenkel, Jr.]
- Conan the Chronicled (1981)
- Incident beyond the Zarkheba (1981)
- Index, Issues V2n61 through V2n70 (1981)
- Pseudohistory (1981)
- Seven Threads (1981)
- Thuds (Amra V2n70, September 1981) (1981)
- Postscript on Prester John (Adventures in Unhistory) (1982)
- Review: The Last Viking (1982)
-
Morning — The Early Herd?Morning - The Early Herd[German] (1983)
- Robert E. Howard's Conan [German] (1983)
- Robert E. Howard's Conan [2] [German] (1983)
- untitled (Magira #34) [German] (1983)
- untitled (Magira #34) [2] [German] (1983)
- untitled (Magira #34) [3] [German] (1983)
- untitled (Magira #34) [7] [German] (1983)
- Heroic Fantasy, February 1984 (1984)
- Heroic Fantasy, February 1984 [2] (1984)
- Memorial: Roy G. Krenkel 1918-1983 (1984)
- RGK - Portfolio (1984)
- Frazetta & Krenkel Index (1985)
-
RKG—A Few Less People at the Table?RKG-A Few Less People at the Table(1985)
-
RKG—A Few Less People at the Table [2]?RKG-A Few Less People at the Table [2](1985)
- Tarzan & The Little Lion (1985)
- The Colossus of Rhodes (1985)
- The Hunt (1985)
- The Vale of the Emerald Poppy (1985)
- Buccaneer Treasure (1985)
- Heroic Fantasy, February 1985 (1985)
- Heroic Fantasy, February 1985 [2] (1985)
- Heroic Fantasy, February 1985 [3] (1985)
- Heroic Fantasy, February 1985 [4] (1985)
- Heroic Fantasy, February 1985 [5] (1985)
- Roy G. Krenkel: A Remembrance (1985)
- Heroic Fantasy, August 1985 (1985)
- Celtica Notes (1986)
- untitled (Magira #37) [German] (1987)
- The Howard Review, Summer 1988 (1988)
- The Barbarian Scroll, #2 July 1988 (1988)
- The Art of Roy G. Krenkel (1989)
- Hannibal (1989)
- The Barbarian Scroll #7 (1989)
- The Barbarian Scroll #8 (1989)
- The Barbarian Scroll #13 (1990)
- The Barbarian Scroll #13 [2] (1990)
- Battleground (1990)
- The Barbarian Scroll #14 ("Conan") (1990)
- The Barbarian Scroll #15 (1991)
- The Howard Review, January 1991 (1991)
- The Howard Review, January 1991 [2] (1991)
- The Howard Review, January 1991 [3] (1991)
- Masters of the Marvelous: Artwork by Roy G. Krenkel and Esteban Maroto (1993)
- The Blufftown Barbarian #4 (1993)
- Conan, Kull and Bran Mak Morn: The Kings of the Night (1997)
- Conan, Kull and Bran Mak Morn: The Kings of the Night ("Old Aquilonia No. 1") (1997)
- Conan, Kull and Bran Mak Morn: The Kings of the Night [2] (1997)
- Conan, Kull and Bran Mak Morn: The Kings of the Night [3] (1997)
- Robert E. Howard: One Character Writer? (1997)
- The Fantastic Worlds of Robert E. Howard (1997)
- The Fantastic Worlds of Robert E. Howard ("Adventure") (1997)
- The Fantastic Worlds of Robert E. Howard [2] (1997)
- The Fantastic Worlds of Robert E. Howard [3] (1997)
- The Fantastic Worlds of Robert E. Howard [4] (1997)
- The Scarlet Citadel: A Portfolio (1997)
- Valley of the Worm: Origins and Interpretations (1997)
- Dracula Meets the Wolfman preliminary sketch (1998)
- The Robert E. Howard Newsletter, V2n1 (1998)
- Reviews (1998)
- A Short Biography of Robert E. Howard (1999)
- A Short Biography of Robert E. Howard [2] (1999)
- Rough sketches for 'Gargoyle' (1999)
- Robert E. Howard: World's Greatest Pulpster Number One (2001)
- Big Cat (2003)
- Cover: King Kull (2003)
- Cover: Messalina (2003)
- Fight with Numa (2003)
- Gifts for Caesar (2003)
- Girl and Saber Tooth Cub, Pen and ink and watercolor (2003)
- Girl, Pen and ink (2003)
- Girl, Pen and ink and colored pencils (2003)
- Illustration, January 2003 (2003)
- Illustration, January 2003 [2] (2003)
- In the Air (2003)
- Interior illustration from "Sea Stories", early 1950s. Pen and ink. (2003)
- Male Lion (2003)
- Mountain Men (2003)
- Pellucidar concept painting (2003)
- Rough for "The Hot Country" (2003)
- Smilodon Californicus (2003)
- The Baths of Khandahar (2003)
- The Lake of Ghosts (2003)
- Untitled cover comp for "Creepy" magazine, early 1960s (2003)
- Untitled, Blue pencil on paper. (2003)
- Amontillado Cam (2004)
- The Skull in the Clouds (2004)
- A Place for Heroes (2004)
- Xero 10 - II (2004) [only as by Roy Krenkel]
- The Howard Review #12 (B&W) (2004)
- The Howard Review, September 2004 (2004)
- The Howard Review, September 2004 [2] (2004)
- The Howard Review, September 2004 [3] (2004)
- The Howard Review, September 2004 [4] (2004)
- The Howard Review, September 2004 [5] (2004)
- The Howard Review, September 2004 [6] (2004)
- The Howard Review, September 2004 [7] (2004)
- The Howard Review, September 2004 [8] (2004)
- 30th Anniversary Intro (2004) with Stephen Fabian and Tom Foster and Frank Frazetta and Jerry Lawler
- RGK: The Art of Roy G. Krenkel (2005)
- Sword & Fantasy #3 (2005)
- The Road to Kull Was Paved with Good Intentions (2005)
- The Krenkel and Frazetta Question (2005)
- King Kull (2005) with John Bolton and Michael Golden and Mike Ploog and John Severin and Marie Severin and Michael Whelan and Barry Windsor-Smith [only as by John Bolton and Michael Golden and Roy G. Krenkel and Michael Ploog and John Severin and Marie Severin and Michael Whelan and Barry Windsor-Smith]
- The Barsoom We'll Probably Never See (2006)
- The Dum-Dum (2006) [only as by Roy Krenkel]
- Sword & Fantasy #5 (2006)
- From Ala to Zarfhaana: The Names of the Pre-Cataclysmic Age, A–Z (2006)
- The Black Stranger and Why I Hate It So (2006)
- The Man from Cross Plains (2006)
- The Man from Cross Plains [2] (2006)
- The Man from Cross Plains [3] (2006)
- The Everlasting Barbarian: Robert E. Howard at 100 Years (2006)
- A Roy G. Krenkel Folio (2008)
- REH Bits and Pieces (2008)
- The Howard Review, October 2008 (Old Alexandria Street Fight) (2008)
- REH: Two-Gun Raconteur #14 (2010)
- REH: Two-Gun Raconteur #14 [2] (2010)
- A Brief Look at Roy Krenkel and His ERB Illustrations (2012)
- A Brief Look at Roy Krenkel and His ERB Illustrations [2] (2012)
- A Brief Look at Roy Krenkel and His ERB Illustrations [3] (2012)
- A Martian Glossary (2012)
- Barsoom and Myself (2012) [only as by Roy Krenkel]
- Windy City Pulp Stories #12 (Tarzan & Numa) (2012) [only as by Roy Krenkel]
- Back to the Stone Age (preliminary study) (2015) [only as by Roy Krenkel]
- Roy G. Krenkel: A Gallery of Science Fiction Art (2016)
- Tarzan and the Jewels of Opar (2016)
- Time to Leave (excerpt) (2016)
- Roy G. Krenkel: Father of Heroic Fantasy: A Centennial Celebration (2019)
- Tarzán en Marte [Spanish] (2022) [only as by Roy Krenkel]
-
The Farthest Star—and Beyond?The Farthest Star-and Beyond(unknown)