Hexbound

Nearly sixteen, Lily Parker has enough difficulty dealing with being at St. Sophia's School for Girls, but now she is having to learn to control newly found magical powers as she, her roommate Scout and other Adepts fight the Reapers, older magic-users who refuse to give up the magic that is corrupting them. When Lily and her friends are attacked one night by a new kind of creature, Lily realizes that she is going to need her powers sooner than she thought.