Publisher's Description from B&N: "When her little sister is brutalized, a vengeful Lily determines to exact her own justice. She succeeds at the cost of her own life, but as she lies dying, she is given a second chance. Lily can earn her way into Paradise by becoming an assassin for the forces of good. It's the job Lily believes she can really get into-but she doesn't realize that she may not be able to get out."
I just started this book last night. It's been in my TBR pile for a while, and since the next two books in the series are out, I thought it would be a good time to start. Then, if I like it, I can read the entire series back-to-back-to-back.