The First Time She Drowned - Kerry Kletter

Cassie O'Malley has spent the past two and a half years in a mental institution dumped there by her mother, against her will. Now, at 18, Cassie emancipates herself, determined to start over. She attends college, forms new friendships, and even attempts to start fresh with her mother. But before long, their unhealthy relationship threatens to pull Cassie under once again. As Cassie struggles to reclaim her life, childhood memories persist and confuse, and Cassie must consider whose version of history is real, and more important, whose life she must save.