If you suspected your best friend, the person you were closest to in the whole world, was a murderer, what would you do? Would you confront her? Would you help keep her secret? Or would you begin to feel afraid? Most importantly, why don't you feel safe now that she's dead?
Elliott outdoes herself here. Readers might feel like they need a notebook to keep track of the threads of the complex plot: who has a secret history with whom, who has been telling lies about what, who really knows what happened on the day Lissa disappeared? Revelation follows revelation, with the pace increasing as the mysteries pile up, leaving us genuinely shocked at the end. A rousing success.