Sorry, it’s not a "comic book" — it’s a "graphic adaptation".
Bits of it are being excerpted on Slate, but I can tell you now that if it didn’t cover such a monsterous event in history, it would be unintentionally funny. Take, for example, this panel showing Bush on 9/11 going to speak to grade school kids in Florida:
As Wonkette points out, it’s clear that Karl Rove is being protrayed by Philip Seymour Hoffman. But what cracks me up is Bush’s Superman-like stature. I mean, who stands like that?