The hollow girl
(Book)

One night, Silas and his friends brutally assault Bethan and a half-Roma friend, Martyn. As empty and hopeless as she feels from the attack, she asks Drina to bring Martyn back from death's door. There is always a price for this kind of magic, Drina warns. The way to save him is gruesome. Bethan must collect grisly pieces to fuel the spell: an ear, some hair, an eye, a nose, and fingers. She gives the boys who assaulted her a chance to come forward and apologize. And when they don't, she knows exactly where to collect her ingredients to save Martyn.