New York Times bestselling,acclaimed horror author Paul Tremblay delivers an unforgettable middle grade debut in this bone-chilling tale of an unsettlingunbreakable friendship. When Casey Wilson’s parents tell him that his friend is coming for a sleepoverhe has no idea who that might be. Ever since the Zoom Incidenteveryone treats him like a pariahand his tics are worse than ever. When Morel appearshe’s not like any friend Casey has ever met. His skin is like clayand he doesn’t speak. But Casey’s parents are charmed by the strange kidand it’s nice to have someone to talk to besides his sisterAllywho is away at college. As his normally loving parents grow distant from Caseythey gush and fawn over Morel. Casey knows something is wrong–but with no end in sight to the sleepoverhe’s exhausted. And in the darkout of the corner of his eyeMorel doesn’t look like a kid at all. . . .