She’s changed schools too many times to count. The only family she’s ever known is her father, a bitter ex-priest who never lets her date and insists she attend the strictest Catholic school in Seattle. And her mother—well, she was a five thousand year old demon. That doesn’t exactly help. But on her sixteenth birthday, her father gives her a present that brings about some unexpected changes. Some of the changes, like strange and wonderful powers and the cute skater boy with a knack for science, are awesome. But others, like the homicidal demon seeking revenge on her family? Not so much. Steeped in mythology, this is an epic tale of a heroine who balances old world with new, science with magic, and the terrifying depths of the underworld with the ordinary halls of high school.

    Now Cara Sweeney is going to be sharing a bathroom with one of them. Handpicked to host the first-ever L’eihr exchange student, Cara thinks her future is set. Not only does she get a free ride to her dream college, she’ll have inside information about the mysterious L’eihrs that every journalist would kill for. Cara’s blog following is about to skyrocket.Still, Cara isn’t sure what to think when she meets Aelyx. Humans and L’eihrs have nearly identical DNA, but cold, infuriatingly brilliant Aelyx couldn’t seem more alien. She’s certain about one thing, though: no human boy is this good-looking.But when Cara's classmates get swept up by anti-L'eihr paranoia, Midtown High School suddenly isn't safe anymore. Threatening notes appear in Cara's locker, and a police officer has to escort her and Aelyx to class. Cara finds support in the last person she expected. She realizes that Aelyx isn’t just her only friend; she's fallen hard for him. But Aelyx has been hiding the truth about the purpose of his exchange, and its potentially deadly consequences. Soon Cara will be in for the fight of her life—not just for herself and the boy she loves, but for the future of her planet.