The Deep End — Katy Newton Naas

When shy sophomore Kaci Lynn Richards moves to a small town, she is nervous about the change. That is, until she befriends the outgoing Jo and meets popular senior James Mitchell. Kaci quickly learns to love her new life…until she begins to see the ghost of a teen girl in her new home. The mystery girl haunts her, giving her visions that leave clues as to who she was and how she met her violent fate. But the more she learns about the girl, the more she finds that life in this sleepy town may not be what it seems.