The Watcher: The Fourth Child

Zo is your average teenage girl with average problems. Well, she's not exactly average. She has a secret only her best friend and roommate, D, knows about. That's because she has the same secret. They both possess the magic of the elements, at least some of them, and have managed to stay under the radar. Until Jr. Year, when they get a new roommate, Jaxa, and everything changes. Suddenly they find that their world is full of demons they never noticed, and the people they've known for years ...