Haunted — Emily L. Goodman

Rowan Alexander wants nothing more than to turn back the clock and live in the past; and that is the one thing that even her considerable powers will not allow her to do. Instead, she turns inward, refusing to use her considerable powers as a necromancer--but that refusal is not without a cost of its own. When her cousin Galen brings her to the most haunted high school in America, it's all she can do to hold the darkness within herself at bay. Given where she's been, letting that darkness out could be very dangerous indeed.