Amazon.com description: Product Description: Phoebe finds herself drawn to Mallory, the strange and secretive new girl at school. Soon the two become as close as sisters . . . until Mallory’s magnetic older brother, Ryland, appears. Ryland has an immediate, exciting hold on Phoebe ― but a dangerous hold, for she begins to question her feelings about her best friend and, worse, about herself. Soon she’ll discover the shocking, fantastical truth about Ryland and Mallory, and about an age-old debt they expect Phoebe to pay. Will she be strong enough to resist? Will she be special enough to save herself? Intensely page-turning, this follow-up to Nancy Werlin’s acclaimed novel Impossible links the real and the otherworldly in a story that is suspenseful, conversation-starting, and utterly alluring.