My killer is out there. And my sister might be next. Two months before I died, my best friend's brother disappeared. I have no idea where Thayer went or why he left, but I know it's my fault. I did a lot of horrible things while I was alive, things that made people "hate" me, maybe even enough to kill me. Desperate to solve my murder, my long-lost twin, Emma, is pretending to be me and unraveling the many mysteries I left behind--my cryptic journal, my tangled love life, the dangerous Lying Game pranks I played. She's uncovered my friends' darkest secrets, but she's never had the chance to dig into Thayer's past--until now. Thayer's back and Emma has to move fast to figure out if he's after revenge . . . or if he's already gotten it. From Sara Shepard, the #1 "New York Times" bestselling author of the Pretty Little Liars books, comes a riveting series about secrets, lies, and killer consequences.