| Beast Marks | 1984 |
| Wyvern | 1988 |
| Hunting the Ghost Dancer | 1991 |
| Kingdom of the Grail | 1992 |
| The Moon's Wife | 1993 |
| Solis | 1994 |
| Silent | 1996 |
| Centuries | 1997 |
| The Perilous Order | 1998 |
| Killing With The Edge of the Moon | 2006 |
Arthor Series |
|
| The Dragon and the Unicorn | 1994 |
| The Eagle and the Sword | 1995 |
| Arthor | 1995 |
| The Wolf and the Crown | 1998 |
| The Serpent and the Grail | 1999 |
The Radix Tetrad |
|
| Radix | 1981 |
| In Other Worlds | 1984 |
| Arc of the Dream | 1986 |
| The Last Legends of Earth | 1989 |
Anthologies |
|
| Made in Goatswood | 1995 |
| The Disciples of Cthulhu | 1996 |
| The Best of Crank! | 1998 |
| The Crow: Shattered Lives & Broken Dreams | 1998 |
| Collections | |
| Twice Dead Things | 2006 |
| Graphic Novels | |
| The Conjure Book | 2007 |
| Series Contributed To | |
| Crow | |
| The Hellbound | 2001 |
| Anthologies Contributed To | |
| New Worlds 7 | 1974 |
| Nameless Places | 1975 |
| New Tales of the Cthulhu Mythos | 1980 |
| The Year's Best Fantasy Stories 12 | 1986 |
| Made in Goatswood | 1995 |
| The Disciples of Cthulhu | 1996 |
| The Best of Crank! | 1998 |
| The Crow: Shattered Lives and Broken Dreams | 1998 |
| Short Stories | |
| Once More, The Dream | 1974 |
| Glimpses | 1975 |
| The Star Pools | 1980 |
| The Last Dragon Master | 1985 |
| The Dark One: A Mythograph | 1994 |
| A Priestess of Nodens | 1995 |
| Hellbent | 1998 |
Written as Adam Lee |
|
Dominions of Irth Trilogy |
|
| The Dark Shore | 1996 |
| The Shadow Eater | 1998 |
| Octoberland | 1999 |