A year after vanishing from a party, screaming and drenched in blood, seventeen-year-old Annaliese Rose Gordon appears hundreds of miles from home with no memory, but a haunting certainty that she is actually another girl trapped in Annaliese's body.

Sixteen-year-old Angie finds herself in her neighborhood with no recollection of her abduction or the three years that have passed since, until alternate personalities start telling her their stories through letters and recordings.

Canaan is a quiet city on an idyllic world, hemmed in by high walls, but every twelve years the town breaks out in a chaos of bloody violence, after which all the people undergo the Forgetting, in which they are left without any trace of memory of themselves, their families, or their lives--but somehow seventeen-year-old Nadia has never forgotten, and she is determined to find out what causes it and how to put a stop to the Forgetting forever.

"What would you do if you forgot the love of your life ever even existed? Stevie and Nora had a love. A secret, epic, once-in-a-lifetime kind of love. They also had a plan: to leave their small, ultra-conservative town and families behind after graduation and move to California, where they could finally stop hiding that love. But then Stevie has a terrible fall. And when she comes to, she can remember nothing of the last two years--not California,...