The premise of this story is amazing (get ready to suspend your disbelief). A few years ago, Detective Cassie Maddox went undercover as Lexie Madison, a made-up identity. Then Lexie turned up dead in a small town near Dublin, and she looked just like Cassie. Dun dun DUN! Cassie went back undercover as Lexie to figure out who murdered her. Lexie lived with a tight-knit group of friends in one house, so Cassie had to be convincing. The housemates were my favorite part of the book. You could really feel how close everyone was, and French did an amazing job of delving into everyone's psyche. Great writing!