Novels[]
- 1988 – Blood Beast
- 2002 – Servants of Chaos
- 2004 – Haven
- 2015 – The Kaleidoscope
- 2015 – The Sinking Island
- 2015 – Caverns of Chaos
- 2015 – Living Things
- 2015 – Perilous Pursuits
- 2015 – Wormdance
- 2015 – Carbon Copies
Novellas[]
Collections[]
- 2011 – Translation Station
- 2015 – Shadows Over Innsmouth
- 2015 – That Way Madness Lies
- 2015 – Little Evils
- 2015 – Passing Death
- 2015 – Elaborate Lies
- 2015 – Date with the Dark
- 2015 – Sandcastles
- 2015 – The Devil Is in the Details
- 2015 – Alien & Otherwise
- 2015 – Phantom of the Space Opera
- 2017 – More Shadows Over R'lyeh
- 2017 – The Retro Collection
- 2019 – Still More Shadows Over R'Lyeh
- 2020 – Translation Station & Other Stories
Novelettes[]
Short Stories[]
Non-Fiction[]
- 1997 – D'Ammassa's Guide to Modern Horror Fiction: An Annotated Bibliography of Works in English
- 2006 – Encyclopedia of Fantasy and Horror Fiction