Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Disturbing premise

Jodi Picault always finds a way to create a twist at the end of her books, and that is true here too. Although the premise is a very dark one, she explores the feelings of her characters in depth and allows the reader to determine what motivtion there really could be, in a situation as disturbing as this one. Was hard to put down, and a bit of light shines at the end that was satisfying.