Beasts made of night (Penguin Putnam Inc)

Seventeen-year-old Taj is the most talented sin-eater indentured by the Guild, a ruthless organization of mages that runs a lucrative trade absolving the rich. In a world where sin can be magically transferred from sinner to "sin-eater" for a cost, gifted young Taj uncovers a dark secret and must rely on his deadly talents to save the kingdom--and his own life.