American Supernatural Tales anthology Penguin, 2007
Black Wings II anthology PS Publishing, 2012
Black Wings IV anthology PS Publishing, 2015
Black Wings: New Tales of Lovecraftian Horror PS
The Evolution of the Weird Tale nonfiction Hippocampus Press, 2004
H.P. Lovecraft: A Life nonfiction Necronomicon Press, 1996
H.P. Lovecraft: An Annotated Bibliography nonfiction Kent State University Press, 1981
H.P. Lovecraft: Selected Letters to Alfred Galpin (STJ &
David E. Schultz, eds.) nonfiction Hippocampus Press, 2003
Icons of Horror and the Supernatural: An Encyclopedia of Our Worst Nightmares nonfiction Greenwood Press, 2006
Letters to Arkham: The Letters of Ramsey Campbell and August Derleth, 1961-1971 nonfiction PS Publishing, 2014
Lord Dunsany: Master of the Anglo-Irish Imagination nonfiction Greenwood Press, 1995
Lovecraft and a World in Transition nonfiction
Ramsey Campbell and Modern Horror Fiction nonfiction Liverpool University Press, 2001
Sixty Years of Arkham House nonfiction Arkham House, 1999
A Subtler Magick: The Writings and Philosopy of H.P. Lovecraft nonfiction Borgo Press, 1997
Supernatural Literature of the World: An Encyclopedia (STJ &
Stefan Dziemianowicz, eds.) nonfiction Greenwood- Heinemann, 2005
Unutterable Horror: A History of Supernatural Fiction, Volumes 1 & 2 nonfiction PS Publishing, 2012
Warnings to the Curious: A Sheaf of Criticism on M.R. James (by
Rosemary Pardoe & STJ) nonfiction Hippocampus Press, 2007
The Weird Tale nonfiction University of Texas Press, 1990