the Red King (with Christopher Golden and Peter Bergting, 2015) Empty Graves (with Christopher Golden and Peter Bergting, 2016) The Red Kingdom (with Christopher Golden and Peter Bergting, 2017) Joe Golem: Occult Detective (Dark Horse): The Rat Catcher (with Christopher Golden and Patric Reynolds, 2015) The Sunken Dead (with Christopher Golden and Patric Reynolds, 2016) The Outer Dark (with Christopher Golden and Patric Reynolds, 2017) Flesh and Blood (with Christopher Golden and Patric Reynolds, 2017) The Drowning City (with Christopher Golden and Peter Bergting, 2018) Mr. Higgins Comes Home (with Warwick Johnson-Cadwell, Dark Horse, 2017) Our Encounters with Evil & Other Stories Library Edition (with Warwick Johnson-Cadwell, Dark Horse, 2023) Hellboy Universe (Dark Horse) Hellboy Seed of Destruction (with John Byrne, 1994) The Wolves of Saint August (1994) The Corpse (1995) The Chained Coffin (1995) The Iron Shoes (1996) Wake the Devil (1996) Almost Colossus (1997) A Christmas Underground (1997) Heads (1998) The Baba Yaga (1998) The Right Hand of Doom (1998) The Vârcolac (1999) Goodbye Mr. Tod (1999) Pancakes (1999) Box Full of Evil (1999) The Nature of the Beast (2000) King Vold (2000) Conqueror Worm (2001) The Third Wish (2002) Dr. Carp's Experiment (2003) The Penanggalan (2004) The Troll-Witch (2004) The Ghoul (2005) The Island (2005) Makoma (with Richard Corben, 2006) The Hydra and the Lion (2006) They That Go Down to the Sea in Ships (with Joshua Dysart and Jason Shawn Alexander, 2007) Darkness Calls (with Duncan Fegredo, 2007) The Vampire of Prague (with P. Craig Russell, 2007) The Mole (with Duncan Fegredo, 2008) The Crooked Man (with Richard Corben, 2008) In the Chapel of Moloch (2008) The Wild Hunt (with Duncan Fegredo, 2008) The Bride of Hell (with Richard Corben, 2009) Hellboy in Mexico (with Richard Corben, 2010) The Storm (with Duncan Fegredo, 2010) The Whittier Legacy (2010) Double Feature of Evil (with Richard Corben, 2010) The Sleeping and the Dead (with Scott Hampton, 2010) Buster Oakley Gets His Wish (with Kevin Nowlan, 2011) Being Human (with Richard Corben, 2011, collected in B.P.R.D.: Being Human) The Fury (with Duncan Fegredo, 2011) House of the Living Dead (with Richard Corben, 2011) Hellboy versus the Aztec Mummy (2011) The Midnight Circus (with Duncan Fegredo, 2013) Hellboy Gets Married (with Mick McMahon, 2013) The Coffin Man (with Fábio Moon, 2014) The Coffin Man 2: The Rematch (with Gabriel Bá, 2015) Into the Silent Sea (with Gary Gianni, 2017) Krampusnacht