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| Other views: | Awards Alphabetical Chronological |
Novels
- Bizarre Honeymoon (1964)
- The Under-People: The Startling Discovery of a Lost World (1969) with Warren Smith [only as by Eric Norman]
- UFO Missionaries Extraordinary (1976) with Hayden Hewes
- The Hypnotist (1979)
- The Chindi (1980)
- Alien Rapture: The Chosen (1998) with Edgar Rothschild Fouchâe
-
Strangers from the Skies (2016)
also appeared as:
- Translation: Estranhos no Céu [Portuguese] (1968)
- Master Movie Monsters (1965)
- Monsters, Maidens & Mayhem: A Pictorial History of Hollywood Film Monsters (1965)
- Strange Guests (1966)
- We Have Lived Before (1967)
- Revelation: The Divine Fire (1973)
- The Enigma of Reincarnation (1973)
- Atlantis Rising (1973)
- Mysteries of Time and Space (1974)
- Project Blue Book (1976)
- The Star People (1981) with Marcia Stanley and Francie Steiger
- The Werewolf Book: The Encyclopedia of Shape-Shifting Beings (2011)
- The Zombie Book: The Encyclopedia of the Living Dead (2014) with Nick Redfern
- Real Visitors, Voices from Beyond, and Parallel Dimensions (2016) with Sherry Hansen Steiger
- Three Tales for the Horrid at Heart (1963)
- Two More Tales for the Horrid at Heart (1963)
- A Better Rat Trap (1965)
-
The Horrible Hag of Detroit (1966)
only appeared as:
- Variant: The Demon of Detroit (1966)
- Ghostly Foxhounds and the Phantom Huntsman (1971)
- Terror at the Moreno Ranch (1975)
Non-Genre Titles
Nonfiction
- Gods of Aquarius (1976)