* The Art of Horror: A Comprehensive History
* Monsters and Madmen: Inside the Minds of Serial Killers
* The Vampire Encyclopedia: A Compendium of the Undead
Fiction
* Necronomicon: The Book of the Dead (co-authored with Marcus Garvey)
* The Howling (co-authored with Gary Brandner)
* The Hunger (co-authored with Whitley Strieber)