45 titles The Outsider (London: Victor Gollancz, 1956 ) [nonfiction: hb/nonpictorial]
Ritual in the Dark (London: Gollancz, 1960 ) [Gerard Sorme : hb/nonpictorial]
The Strength to Dream: Literature and the Imagination (London: Victor Gollancz, 1962 ) [nonfiction: coll: hb/nonpictorial]
Man Without a Shadow: The Diary of an Existentialist (London: Arthur Barker, 1963 ) [Gerard Sorme : hb/nonpictorial]
The Sex Diary of Gerard Sorme (New York: The Dial Press, 1963 ) [vt of the above: Gerard Sorme : hb/]
The Mind Parasites (London: Arthur Barker, 1967 ) [Cthulhu Mythos : hb/uncredited]
The Glass Cage (London: Arthur Barker, 1967 ) [hb/]
The Philosopher's Stone (London: Arthur Barker, 1969 ) [Cthulhu Mythos : hb/Michael Whittlesea]
The Strange Genius of David Lindsay: An Appreciation (London: John Baker, 1970 ) with E H Visiak and J B Pick [nonfiction: anth: David Lindsay : hb/nonpictorial]
The God of the Labyrinth (London: Rupert Hart-Davis, 1970 ) [Gerard Sorme : hb/]
The Black Room (London: Weidenfeld and Nicolson, 1971 ) [hb/]
The Hedonists (New York: Signet, 1971 ) [vt of the above: Gerard Sorme : pb/]
The Occult (London: Hodder and Stoughton, 1971 ) [nonfiction: hb/]
Tree by Tolkien (London: Covent Garden Press/INCA, 1973 ) [nonfiction: chap: on J R R Tolkien : hb/Peter Juerges]
The Schoolgirl Murder Case (London: Hart-Davis, MacGibbon, 1974 ) [Inspector Gregory Saltfleet : hb/]
The Return of the Lloigor (London: Village Press, 1974 ) [chap: Cthulhu Mythos : pb/nonpictorial]
Jorge Luis Borges (London: Village Press, 1974 ) [nonfiction: chap: Jorge Luis Borges : pb/Hugo Manning]
Hermann Hesse (London: Village Press, 1974 ) [nonfiction: chap: Hermann Hesse : pb/photographic]
The Space Vampires (London: Hart-Davis, MacGibbon, 1976 ) [hb/nonpictorial]
Dark Dimensions: A Celebration of the Occult (New York: Everest House, 1978 ) [nonfiction: anth: brief biographies of occultists: hb/]
Mysteries: An Investigation into the Occult, the Paranormal, and the Supernatural (London: Hodder and Stoughton, 1978 ) [nonfiction: sequel to The Occult above: hb/]
Science Fiction as Existentialism (Hayes, Middlesex: Bran's Head, 1978 ) [nonfiction: chap: pamphlet: pb/]
The Haunted Man (San Bernardino, California: The Borgo Press, 1979 ) with E H Visiak and J B Pick [nonfiction: anth: vt of the above: David Lindsay : hb/Judy Cloyd]
The Book of Time (Newton Abbot, Devon: David and Charles/Westbridge Books, 1980 ) with John Grant [nonfiction: anth: essays on Time : Wilson is "consultant editor", Grant actual editor: hb/photographic]
Starseekers (London: Hodder and Stoughton, 1980 ) [nonfiction: hb/]
Frankenstein's Castle: The Right Brain: Door to Wisdom (Bath, Somerset: Ashgrove Press, 1980 ) [nonfiction: hb/Angela Lewer]
The Directory of Possibilities (Exeter, Devon: Webb and Bower, 1981 ) with John Grant [nonfiction: anth: hb/Peter Wrigley]
The Quest for Wilhelm Reich (London: Granada, 1981 ) [nonfiction: hb/nonpictorial]
Poltergeist! A Study in Destructive Haunting (London: New English Library, 1981 ) [nonfiction: Poltergeists : hb/nonpictorial]
The Janus Murder Case (London: Granada, 1984 ) [Inspector Gregory Saltfleet : hb/]
A Criminal History of Mankind (London: Granada, 1984 ) [nonfiction: hb/photographic]
Lifeforce (New York: Warner Books, 1985 ) [vt of the above: pb/]
The Personality Surgeon (London: New English Library, 1985 ) [hb/]
Afterlife: An Investigation of the Evidence for Life After Death (London: Harrap, 1985 ) [nonfiction: hb/]
Spider World: The Tower (London: Grafton, 1987 ) [Spider World : hb/Chris Foss ]
Spider World: The Delta (London: Grafton, 1987 ) [Spider World : hb/Chris Foss ]
Spider World 1: The Desert (New York: Ace Books, 1988 ) [cut vt: first part of the above: Spider World : pb/Luis Rey]
Beyond the Occult: Twenty Years' Research Into the Paranormal (London: Bantam Press, 1988 ) [nonfiction: hb/]
Spider World 2: The Tower (New York: Ace Books, 1989 ) [cut vt: second part of the above: Spider World : pb/Luis Rey]
Spider World 3: The Fortress (New York: Ace Books, 1989 ) [cut vt: third part of the above: Spider World : pb/Luis Rey]
Written in Blood: A History of Forensic Detection (Wellingborough, Northamptonshire: Equation, 1989 ) [nonfiction: hb/]
The Mammoth Book of the Supernatural (London: Robinson, 1991 ) with Damon Wilson [nonfiction: Damon Wilson is the author's son: pb/]
Spider World: The Magician (London: HarperCollins, 1992 ) [Spider World : hb/Chris Foss ]
From Atlantis to the Sphinx: Recovering the Lost Wisdom of the Ancient World (London: Virgin Books, 1996 ) [nonfiction: hb/]
Spider World: Shadowland (Charlottesville, Virginia: Hampton Roads Publishing, 2003 ) [Spider World : pb/]