Savage Moon - Magic and Moonlight, #1

Eben Savage spends most of his time pretending he doesn't have magic. It's a painful reminder of the mother he inherited it from and lost. But when a girl is killed by dark magic just outside of town, Eben is the only one who might have the power to stop her killer-if he can actually get his wonky magic to listen to him, that is. He doesn't count on falling for her brother, a handsome and surly werewolf named Drystan Lowell, who tells him that his entire bloodline has been killed in the same ritualistic way as his sister.
Now, Eben is the only thing standing between Drystan and certain death. With his friends caught in the crossfire and his crush's life on the line, Eben will have to reckon with the supernatural side of himself to keep Drystan from becoming the killer's final victim.