Novels[]
- 1988 – Ghouls
- 1991 – Coven
- 1991 – Incubi
- 1992 – Succubi
- 1993 – The Chosen
- 1994 – Creekers
- 1997 – The Bighead
- 1998 – Portrait of the Psychopath as a Young Woman with Elizabeth Steffen
- 1999 – Dahmer's Not Dead with Elizabeth Steffen
- 1999 – Stickmen
- 1999 – Operator B
- 2001 – City Infernal
- 2002 – Family Tradition with John Pelan
- 2002 – Monstrosity
- 2003 – Infernal Angel
- 2003 – Goon with John Pelan
- 2004 – The Messenger
- 2004 – Flesh Gothic
- 2005 – Shifters with John Pelan
- 2005 – The Backwoods
- 2006 – Slither
- 2007 – House Infernal
- 2008 – Brides of the Impaler
- 2009 – The Golem
- 2009 – Golemesque
- 2009 – The Black Train
- 2009 – The Minotauress
- 2010 – The Haunter of the Threshold
- 2010 – The Innswich Horror
- 2010 – Lucifer's Lottery
- 2011 – Going Monstering
- 2011 – Header 2
- 2011 – Monster Lake
- 2012 – Witch House
- 2012 – Witch Water