The best kind of story--one that will both break your heart and scare the hell out of you. --Jennifer McMahon, New York Times bestselling author for They Drown Our Daughters ONCE SHE HAS HER GRIP ON YOU, SHE'LL NEVER LET YOU GO. At four months old, Olivia Dahl was almost murdered. Driven by haunting visions, her mother became obsessed with the idea that Olivia was a changeling, and that the only way...