Full-length comic books and graphic novels include:
- Primer, #1 (1996), Comico; with Vincent Proce
- Jonny Double (1998), four-issue mini-series, Vertigo; with Eduardo Risso
- 100 Bullets (1999—2009), Vertigo; with Eduardo Risso
- Hellblazer #146-174 (2000—2002), Vertigo; with Marcelo Frusin, Richard Corben, Steve Dillon, Guy Davis and Giuseppe Camuncoli
- Startling Stories: Banner (2001), four-issue mini-series, Marvel Comics; with Richard Corben
- El Diablo (2001), four-issue mini-series, Vertigo; with Danijel Zezelj
- Cage (2002), five-issue limited series, Marvel MAX; with Richard Corben
- Spider-Man's Tangled Web "The Last Shoot" #14 (2002), Marvel Comics; with Raven (co-writer) and Giuseppe Camuncoli (penciller)
- Sgt. Rock: Between Hell and a Hard Place (2003), DC Comics; with Joe Kubert
- Batman:
- Batman/Deathblow: After the Fire (2003), three-issue mini-series, DC Comics/Wildstorm; with Lee Bermejo
- Broken City #620-625 (2003—2004), DC Comics; with Eduardo Risso
- Joker (2008), original graphic novel, DC Comics; with Lee Bermejo
- Batman in Wednesday Comics (2009): with art by Eduardo Risso
- For Tomorrow #204-215 (2004—2005), DC Comics; with Jim Lee
- Man of Steel (2005), five-issue limited series, DC Comics; with Lee Bermejo
- Loveless (beginning 2005 - ending 2008), Vertigo; with Marcelo Frusin, Danijel Zezelj, and Werther Dell'Edera
- Deathblow (beginning 2006), Wildstorm; with Carlos D'Anda
- Architecture and Morality, Tales of the Unexpected #1-8 (2006—2007), back-up stories, DC Comics; with Cliff Chiang
- Filthy Rich (2009), B&W original graphic novel, Vertigo Crime; with Victor Santos
- First Wave:
- Batman/Doc Savage Special (November 11, 2009), 56-page, prestige-format one-shot, DC Comics; with Phil Noto
- First Wave (2010), 6-issue limited series, DC Comics; with Rags Morales
Short stories
- Weird War Tales #1 (1997), "Ares", Vertigo; with James Romberger
- Gangland, #1 (1998), "Clean House", Vertigo; with Tim Bradstreet
- Heartthrobs #2 (1999), "The Other Side of Town", Vertigo; with Tim Bradstreet
- Strange Adventures #4 (1999), "Native Tongue", Vertigo; with Essad Ribic
- Gotham Knights #8 (2000), "Batman Black & White", DC Comics; with Eduardo Risso
- Vertigo Secret Files: Hellblazer #1 (2000), one story, Vertigo; with Dave Taylor
- Flinch #2, 10 & 13 (2000) "Food Chain", "Last Call", and "The Shaft", Vertigo; with Eduardo Risso, Daniel Zezelj & Javier Pulido
- Winter's Edge #3 (2000) "100 Bullets: Silencer Night", Vertigo; with Eduardo Risso
- Wildstorm Summer Special (2001), "Zealot: Apple Read"; Wildstorm; with Brian Stelfreeze
- 9-11 - The World's Finest Comic Book Writers & Artists Tell Stories to Remember #2 (2002), "America's Pastime", DC Comics; with Eduardo Risso
- JSA All-Stars #6 (2003), Golden Age Dr. Mid-Nite story, DC Comics; with Eduardo Risso
- DC Comics Presents: Green Lantern #1 (2004), "Penny for Your Thoughts, Dollar For Your Destiny", DC Comics; with Norm Breyfogle
- Solo #1 & 6 (2005) "Low Card in the Hole" and "Poison", DC Comics; with Tim Sale and Jordi Bernet