The Replacement by Brenna Yovanoff by 344

In this dark debut novel, 16 year old Mackie has a good reason to feel like an alienated outcast at school and in town. Mackie is a changeling who was swapped for the real son when he was a baby. In Gentry, there is an unspoken agreement that a child is stolen every seven years in exchange for the town's prosperity. Mackie's struggles to exist under the radar is difficult because of his his severe allergies to metal and blood, and his inability to set foot on consecrated ground. When Tate's baby sister is abducted and a Replacement left in her place, Mackie reluctantly agrees to try to save her from certain death. Mackie is fortunate to have the support of his minister father, devoted big sister, and stalwart friends. He succumbs to an attraction to unconventional Tate. The depiction of rival underworld clans is deliciously macabre. This should appeal to teens looking for a new horror and grim fantasy read.