I'm still digesting as to whether i liked this or not! It was definitely disturbing and there were lots of twists and turns but:
SPOILER ALERT (maybe!): I wanted Laura stopped. I suppose with how the book finished and if there was a second book it could happen but at this point of time I wanted her stopped. It was not a happy ending which I am fine with, I have read the Hunger Games trilogy and Christine and both it was not happy but at least the bad guy was stopped. It looked possible throughout the book but she kept escaping her fate.
So overall, I think I liked the book, just wished for a different ending