Compilation of five stories listed as 100 Bullets 1-5 and Vertigo: Winter's Edge 3.
I just don't get worked up about comic book novels like some people do. I like Sacco's work quite a bit, and the Astro City series had some great stories, but mostly I am left unfulfilled. Azzarello has received heaps of praise for 100 Bullets. 100 was really just a brief collection of short stories and the stories are only loosely held together by a single character, Agent Graves. The stories were good but there was nothing spectacular. I am also fairly picky about artwork, if I don't like the artist's style I won't like the book.
Agent Graves suddenly appears in the lives of different victims and offers them vengeance. The protagonist will be untouchable by any law enforcement agency and all investigations cease once the fired rounds are recovered. Person ponders, person decides, things happen.