The fairies have stolen Tam’s baby sister—and he has to get her back! Tam wakes up in the middle of the night to the sound of laughing . . . and howling. He runs to his baby sister Blue’s room, but she’s gone and there’s a goblin baby in her place! Blue has been stolen by the fairies and only Tam can get her back. But in order to swap the goblin baby for his sister, he’ll have to face enchanted beasts, cross a wide sapphire lake, and give up the thing he loves most in the world.