The Headless Cupid is about David Stanley and his younger siblings, whose father just recently remarried, and whose stepmother has a twelve-year-old daughter fascinated by the supernatural. David, Janie, Blair and Esther are all younger than Amanda, the new stepsister, and very interested in her occult pastimes. But as mysterious ghostly happenings begin to upset the family's routine, David begins to suspect there's more to his new stepsister's magical powers than she'd like them to believe.
The story is a great book about families and has wonderful fantasy elements. Definitely recommend!