100 Bullets, Volume 1: First Shot, Last Call — Brian Azzarello

In this dark and intriguing collection, the mysterious Agent Graves approaches ordinary citizens and gives them an opportunity to exact revenge on a person who has wronged them. Offering his clients an attache case containing proof of the deed and a gun, he guarantees his 'clients' full immunity for all of their actions, including murder. In these opening chapters, Dizzy Cordova, a Latina gangbanger who has just finished a prison sentence, is given the chance to avenge her family's murders, and a downtrodden bartender receives the opportunity to exact revenge against the woman that ruined his life.