When the sun goes down, it all goes down. . . "There are monsters among us. There always have been and there always will be. I've known that ever since I can remember, just like I've always known I was one. . . Well, half of one, anyway." Welcome to the Big Apple. There's a troll under the Brooklyn Bridge, a boggle in Central Park, and a beautiful vampire in a penthouse on the Upper East Side - and that's only the beginning. Of course, most humans are oblivious to the preternatural nightlife around them, but Cal Leandros is only half-human. His father's dark lineage is the stuff of nightmares - and he and his entire otherworldly race are after Cal. Why? Cal hasn't exactly wanted to stick around long enough to find out. He and his half-brother Niko have managed to stay a step ahead for three years, but now Cal's dad has found them again. And Cal is about to learn why they want him, why they've always wanted him. . . for he is the key to unleashing their hell on earth. The fate of the human world will be decided in the fight of Cal's life.