This is a great book for teens. A girl named Evie is a normal teenager one day, and the next she is a Shield, a protector for her friend Kitty. Evie doesn't know who she is protecting Kitty from- all they know is that someone is out to get her.

I really enjoyed this book- it's a great change from normal fantasy and teen fiction. It kept me on the edge of my seat. Highly recommended!