Walter Greatshell here. I am the author of XOMBIES (Berkley, 2004), which was rereleased as XOMBIES: APOCALYPSE BLUES (2009), and followed by the sequels XOMBIES: APOCALYPTICON (2010), and XOMBIES: APOCALYPSO (2011). I have a short story called "The Mexican Bus" in the zombie anthology THE LIVING DEAD 2 (Night Shade Books), and my novel MAD SKILLS was called "the literary equivalent of a syringe of adrenaline" by Publishers Weekly. My latest books are the giant satire ENORMITY (Night Shade Books), written under the pen-name W.G. Marshall, and TERMINAL ISLAND, a novel of suspense and cosmic terror.