You Are Not Alone by Greer Hendricks and Sarah Pekkanen

Shay witnesses a woman commit suicide on a deserted subway stop and is traumatized. Trying to find clarity and understand why it happened she begins to research who the victim was and everything about her even though the police tell her to let it go. This leads her to Amanda's friends who take Shay under their protective wing but all is not on the level. Before she knows it her life has been remade and her new friends are making her life better right? Psychological cat and mouse game that these two authors excel at. It feels like when you shout out "look behind you" in a scary movie. You know where it is going but you are powerless to stop it. Taunt, perfectly crafted and really diabolical, this is one thriller that will have you looking over your shoulder. For fans of all those thrillers that mess with your head.