There are monsters among us. There always have been and there always will be. I've known that 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 four 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: 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...