This was a great mystery! Very dark though. No one with a weak stomach should read. Not torture "corn", but very descriptive in the spots it needed it. Nothing was said for the sake of saying it. The heart of this story is a family, specifically sisters and their relationship. Great twists. Some obvious, some not. I would recommend this to anyone that likes a little dark mystery. 

SPOILERS AHEAD!!!! DO NOT CONTINUE IF YOU DO NOT WANT SPOILERS. 

<The book opens with sisters Samantha, 15, and Charlotte, 13, practicing a relay race in their yard. Their mom is inside. They are expecting their dad who is a defense attorney at any time. The girls go in to prepare for dinner and two masks men show up. Through the ordeal, the mom is murdered, Sam is shot in the head and buried alive, and we think Charlotte runs away to the neighbors house and gets help.
It then flashforwards 28 years. Sam is a parent lawyer in New York. Charlie is a defense attorney in their home town. Sam has lost her husband to cancer. Charlie is having a rough time in her marriage. The girls have not spoken in years. Charlie has to go to the middle school to get her phone from a one night stand when a school shooting occurs. 
The rest of the book is trying to figure out what really happened in the school, how these people are intertwined with what happened to the girls years ago, and fixing the familial relationships.>