Oh what a neat idea! You know artist Rob Sacchetto? (He did those cool zombie cards in Jonathan Maberry's Rot & Ruin series??)
**** Well... he's got an original coloring book idea going on Kickstarter! Zombies, and Monsters, oh my!
15 Days to go.... check it out!! Pledges are $8 US and up...
Here's one of the cool illustrations!