Source: vertigocomics.com

9. 100 Bullets

(Vertigo)

If you knew you could get away with it, would you kill someone? The person you've always hated, someone who did something truly horrible to you…Would you kill that person if you knew you would 100 percent get away with it?

That’s the question asked in 100 Bullets. The mysterious Agent Graves presents various people who want someone dead with a gun and 100 untraceable bullets, and tells them to use them however they want. What each person does is up to that person.

The first trade in this series, 100 Bullets: First Shot, Last Call is tense and thrilling crime fiction that is addicting as hell.

The book ran 100 issues, plus a miniseries focusing on the character Brother Lono. I have not read the entire thing at this point in time (I'm a busy man), so I can't vouch for the whole series, but what I have read already earns it a spot on this list.