1. Seed of Destruction (1994) by John L Byrne and Mike Mignola
Hellboy (1995) by Mike Mignola
Wolves of St Augustus (1996) by Mike Mignola
Ghost Hellboy (1997) by Mike Mignola
The Lost Army (1997) by Christopher Golden
4. Wake the Devil (1997) by Mike Mignola
The Chained Coffin and Others (1998) by Mike Mignola
Odd Jobs (1999) by Christopher Golden and Mike Mignola
Lunch Box (1999) by Mike Mignola
Conqueror Worm (2002) by John L Byrne and Mike Mignola
The Right Hand of Doom (2002) by Mike Mignola
The Bones of Giants (2003) by Christopher Golden
Hellboy (2004) by Yvonne Navarro
On Earth as It Is in Hell (2005) by Brian Hodge
Unnatural Selection (2006) by Tim Lebbon
The God Machine (2006) by Thomas E Sniegoski
The Dragon Pool (2007) by Christopher Golden
Judgement Bell (2007) by Jim Pascoe
The Black Wedding (2007) by Jim Pascoe
Emerald Hell (2008) by Tom Piccirilli
The Fire Wolves (2009) by Tim Lebbon
The Ice Wolves (2009) by Mark Chadbourn