A lonely boy accidentally awakens an eldritch sea god in this YA horror from the New York Times bestselling author of Don't Let the Forest In. The only thing Jonathan Covey wants from the gloomy, moldering isle of Kelcarrow is to leave. Summer is ending, and his friends are looking forward to college on the mainland, unaware that Jonathan was not accepted to join them. He'll be left behind with nothing but the ocean's haunts and a rising dread of being abandoned.In an act of wild desperation, Jonathan pays a tithe to Scorpion Deep, an eldritch sea god who many of the locals have dismissed as myth. He wants to forget the past, he wants to follow his friends, and most of all he wants to escape.To his horror, the ritual works and Scorpion Deep awakens. Despite his terror, Jonathan is drawn toward the ageless entity that is just as obsessed with him. As scales start growing down his spine and Scorpion Deep's adoration turns bloody, Jonathan realises the only way to end the nightmare is to destroy the monster. One way or another.But once a god has awoken, the only way to be free is to pay a price in blood.