I feel the same way about this book as I felt about "Dark Places" by Gillian Flynn. The appeal of this mystery is the unreliability of the main narrator and the chapters from the victim's point-of-view leading up to her murder. Scraps of information are dealt out, enough to keep me guessing, but enough is withheld so that I didn't know for sure what happened until the big reveal at the end. I had my suspicions from the start (and it turns out, I was right), but all the characters involved were so shady and untrustworthy, that I wouldn't have been surprised if any one of them turned out to be the killer. However, like "Dark Places" a lot of the characters are really unlikeable and I just felt so bad for Rachel. Reading this made me sad and angry and anxious for her. Overall, it was an ok mystery. I don't really get why it's been so hugely popular.