The Gift of the Demons — Mette Ivie Harrison

Fallin is falling for the wrong guy--way wrong. He's an old janitor/demon fighter--or is he?

When she finds out that Nick has made his own bargain with a demon, and that the girl he loves doesn't know what he's given up for her. Fallin wants to help, but she also wants him for herself.

A contemporary, magical YA retelling of O Henry's famous "The Gift of the Magi" with a Jamaican-American adopted young woman in a majority white high school.