Pretty Little Liars
The way this book ended was very angering. It is a series of book so the author left it hanging at the end so it could pick up in the second book. They think that they have found the body of the girls' missing friend which is obviously a huge deal. If they have found Alli's body then that means that she is not "A". But how can she not be "A". She was the only one who knew all the secrets that "A". So the girls are extremely confused and so are the readers because that means that there is someone else out there that knows their secrets. Every time we think we know who it is something proves that wrong. But since there are like eight books in the series I don't think I am going to find out for a while who "A" is.