Gotham City Sirens Vol. 1: Union HC — Paul Dini

This graphic novel features the bad girls of Gotham City! Catwoman, Poison Ivy and Harley Quinn are tired of playing by other people's rules regardless of which side of the law they're on. These tough ladies have a new agenda that's all their own, and they'll use any means necessary to pursue it. But can they get along and work as a team? And who will get hurt along the way?