Null and Void — Jane Toombs

Two ten-year-old girls, Ari and Mandy vanish. One is found so traumatized she can't remember what happened or who she is. A barrette in her hair with a name on It identifies her as Ari. An uncle and aunt arrive and take her away from Null House. Her memory never returns. Twenty years later Mandy's grandmother invites her back to help identify a woman claiming to be the long lost Mandy. Ari's never told anyone about the child's voice in her head that whispers to her at night. She doesn't want to go, but the voice tells that she must because now it's time…