Novels
- Underground (1992)
- Nocturne (1994)
- The Eternal (1996)
- Scissorman (1997)
The Age of Misrule
- World's End (1999)
- Darkest Hour (2000)
- Always Forever (2001)
The Dark Age
- The Devil in Green (2002)
- The Queen of Sinister (2004)
- The Hounds Of Avalon (2005)
Kingdom of the Serpent
- Jack of Ravens (2006)
- The Burning Man (2008)
- Destroyer of Worlds (July 2009)
The Ghost Warrior
- Lord of Silence (July 2009)
Swords of Albion
- The Silver Skull (November 2009, UK: April 2010)
Novellas
- The Fairy Feller's Master Stroke(2002)
- Dr Who: Wonderland (2003)
Non fiction
Other works
- The Book of Shadows (2006) (graphic novel)
- Hellboy: The Oddest Jobs - Straight No Chaser (2008)
- Hellboy: The Ice Wolves (October 2009)
Plus numerous short stories including the award winning "Whisper Lane" in
BFS — A Celebration anthology in 2006, and "Who Slays the Gyant, Wounds the Beast" in
The Solaris Book of New Fantasy (UK) December 2007