Comic book artist who has gained acclaim particularly for his work for DC Comics, including for Lex Luthor: Man of Steel and Batman: Noel. He won the 2008 IGN Comic Award for best graphic novel for his work on DC's Joker.
He taught himself comic drawing technique. He began his illustration career working on comics in 1997 for WildStorm.
He provided the illustration for the 2012 animated film Superman vs. The Elite. He won the 2015 Eisner Award for best short story for his work Rule Number One.
He was originally born and raised in the US.
He and Brian Azzarello have been long-time collaborators for DC Comics.