His anthologies include The Dedalus Book of Decadence (Moral Ruins) (1990) and The Dedalus Book of British Fantasy (1991). Reference books to which he has contributed include the Clute/Nicholls Encyclopedia of Science Fiction (1979; 2nd ed. 1993), Neil Barron's Anatomy of Wonder (2nd. ed. 1981; 3rd ed. 1987; 4th ed. 1995) and The Cambridge Guide to Literature in English (1988; 2nd ed 1993).
Due in the near future are Kiss the Goat: A Twenty-first Century Ghost Story (Prime Press), a US edition of Year Zero (Five Star; first published 2000), Swan Songs: The Complete Hooded Swan Collection (SF Book Club; omnibus of six books first published 1972-75) and Complications and Other Stories (Cosmos). His current projects include the compilation a Historical Dictionary of Science Fiction Literature for Scarecrow Press.
novels: The Stones of Camelot (2006), The New Faust the Tragicomique (2007), The Shadow of Frankenstein (2008) Sherlock Holmes and the Vampires of Eternity (2009), Frankenstein and the Vampire Countess (2009), Frankenstein in London (2011)
short stories collection: The Wayward Muse (2005)
short stories: Tales of the Shadowmen 1 (2005), Tales of the Shadowmen 2 (2006), Tales of the Shadowmen 3 (2007), Tales of the Shadowmen 4 (2008), Tales of the Shadowwen 5 (2009), Tales of the Shadowmen 6 (2010), Tales of the Shadowmen 7 (2011)
adaptations: The Extraordinary Adventures of a Russian Scientist Across the Solar System I-II (2009), The Adventures of Saturnin Farandoul (2009), The Age of Lead (2010), Anne of the Isles (2007), The Black Coats: 'Salem Street (2005), The Black Coats: The Invisible Weapon (2006), The Black Coats: The Parisian Jungle (2008), The Black Coats: The Companions of the Treasure (2008), The Black Coats: Heart of Steel (2010), The Black Coats: The Cadet Gang (2010), The Black Coats: The Sword Swallower (forthcoming), Captain Vampire (2007), Chalet in the Sky (forthcoming), The Clock of the Centuries (2008), The Eye of Purgatory (2010) Felifax (2007), The Gardens of the Apocalypse (2010), The Germans on Venus (2009), Ignis: The Central Fire (2009), An Inhabitant from the Planet Mars (2008), John Devil (2005), Journey to the Land of the Fourth Dimension (2009), Knightshade (2003), The Terror of Madame Atomos (2010), The Man Who Found Himself (2010), The Martian Epic (2008), Mysteryville (2010), News from the Moon (2007), The Novel of the Future (2008), The Nyctalope vs. Lucifer (2007), The Nyctalope on Mars (2008), Enter the Nyctalope (2009), Ortog (2010), Panic in Paris (2009), The People of the Pole (2008), Maurice Renard: [ Doctor Lerne (2010), A Man Among the Microbes (2010), The Blue Peril (2010), The Doctored Man (2010), The Master of Light (2010) ]. Revenants (2006), J.-H. Rosny Aîné: [ The Navigators of Space (2010), The World of the Variants (2010), The Mysterious Force (2010), Vamireh (2010), The Givreuse Enigma (2010), The Young Vampire (2010) ], Sâr Dubnotal vs. Jack the Ripper (2009), The Scaffold (2004), The Song of Montsegur (2010), The Superhumans (2011), The Supreme Progress (forthcoming), Vampire City (2003), The Vampire Countess (2003), The Vampire Soul (2004), The Vampire and the Devil's Son (2007), The Vampires of Mars (2008), The Wandering Jew's Daughter (2005)