Titles by J. N. Williamson marked with tag: horror
- 2001 - Affinity
- 1999 - The Haunt
- 1994 - Bloodlines
- 1993 - Don't Take Away the Light
- 1993 - Goddam Time with Scott Fogel
- 1992 - The Monastery
- 1991 - Hell Storm
- 1991 - The Night Seasons
- 1989 - Monstrum
- 1989 - Shadows of Death
- 1989 - The Black School
- 1988 - After-Howl
- 1988 - Dead to the World
- 1987 - Evil Offspring
- 1986 - Bleed Bargaining
- 1986 - If I Make My Bed in Hell
- 1985 - The Longest Night
- 1984 - Babel's Children
- 1982 - Brotherkind
- 1982 - Playmates
- 1982 - The Evil One
- 1981 - Horror House
- 1981 - The Banished