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| Other views: | Summary Awards Chronological |
Novels
- A Dick for All Seasons (1970)
- A Dick for All Seasons (1970) with Pablo Kane
- America 2040 (1986)
- America 2040 (1986) with Evan Innes
- Closed System (1986)
- Deep Freeze (1992)
- Die rote Flut [German] (1977)
- For Texas and Zed (1976)
- Gold Star (1983)
- Gwen, in Green (1974)
- Gwen, in Green (1974) with Hugh Zachary
- Killbird (1980)
- Life Force (1988)
- Mother Lode (1991)
-
Mücken gibt es überall?Muecken gibt es ueberall[German] (1979)
- Pressure Man (1980)
- Rosy Cheeks (1969)
- Rosy Cheeks (1969) with Peter Kanto
- Sundrinker (1987)
- The Book of Rack the Healer (1973)
- The City in the Mist (1987)
- The City in the Mist (1987) with Evan Innes
- The Dark Side (1987)
- The Golden World (1986)
- The Golden World (1986) with Evan Innes
- The Legend of Miaree (1974)
- The Omnificence Factor (1994)
- The Return (1988)
- The Return (1988) with Evan Innes
- The Revenant (1988)
- The Revenant (1988) with Hugh Zachary
- The St. Francis Effect (1976)
- The Star Explorer (1988)
- The Star Explorer (1988) with Evan Innes
- The Stork Factor (1975)
- The World Where Sex Was Born (1968)
- The World Where Sex Was Born (1968) with Peter Kanto
- Thunderworld (1982)
- Tide (1974)
- Tiger in the Stars (1976)
- Chi Erano Gli Dei Dell'uomo (Complete Novel) [Italian] (1981)
- Il morbo di San Francesco (Complete Novel) [Italian] (1978)
- La Scomparsa Del "Rimfire" (Complete Novel) [Italian] (1984) with Zack Hughes
- Segnali da Giove (Complete Novel) [Italian] (1982)
- The Book of Rack the Healer (Part 1 of 2) (1972)
- The Book of Rack the Healer (Part 2 of 2) (1972)
- Seed of the Gods (1974)
- Unter Millionen von katalogisierten Gestirnen gab es eine kleine gelbe Sonne mit einer Schar von Planeten ... [German] (1979)
- Il campo degli UFO [Italian] (1976)
- Seed of the Gods (1974)
- Unter Millionen von katalogisierten Gestirnen gab es eine kleine gelbe Sonne mit einer Schar von Planeten ... [German] (1979)