This is my favorite book series.It's by author Sara Shepard and it's also a TV series on ABC Family.If you don't know about this series,it's about a clique of girls coming together after their queen bee mysteriously goes missing to find out what happened to her.But when they start getting strange text messages from a sender known only as A,they begin to think that there's more to their friend's disappearance than meets the eye.The book and TV series are quite different and I favor the books more.