4-4.5 stars. 
 Really enjoyed the book! If you are after a short contemporary/mystery/thriller read then definitely give this book a go. It is so short that I feel like you can't go wrong with this book. I read it in a day, you could read it in one sitting and it's gripping the entire way through. I don't want to say too much about it because honestly it would read best with you knowing very little about the book, and while you read it, I can promise you that it feels eery and awfully intriguing. The build up of this entire book is really well done, and the plot unravels in such a well-timed manner. The whole time I felt like I had butterflies in my stomach, with a constant anticipation of some reveal. It was very gripping! 
 Also, it was a really smart novel and I feel like a reread would be really fun. Will do sometime! 
 And Emily Lockhart's writing OMFG. I loved it. She uses a lot of line breaks mid sentence to make it seem like poetry - and it doesn't seem cheesy or showy, but just sucks you in even more. Also her metaphors will literally leave your jaw-dropped, I can't gush enough about the first main one in the book It's literally 5 pages in and I loved it. If you've read the book and want to know what I'm talking about... (do NOT open this if you haven't read the book. It's literally five pages in, you don't have to wait long for it, and it had amazing impact) (view spoiler)[ the part when her dad is leaving her and getting in the car, and she says "Then he pulled out a handgun and shot me in the chest". I LITERALLY DROPPED THE BOOK and WHISPER SCREAMED "WTF". (hide spoiler)] 
 I was kind of haunted after this book, to be honest, but it was cool. 
 Definitely would recommend.