The Calling - The Descendants Series, #2

She was given a second chance to prove that she could manifest her powers. She had no idea she'd have to hide them. Ever since Rayah could remember, she had always been different from everyone else. Not only was she the prized daughter of the greatest collectors known to history, but she was also branded a null. To the students of Monroe Academy, Rayah was a privileged failure. A lightless lighter.
A worthless Lytonian. And if it weren't for her parents, they would have been calling her a slave years ago. In only a few months, Rayah had to present her abilities to the council and prove to them that she was worthy of walking the halls of the academy, but Major Artemis St. James, her tormentor and superior officer, would stop at nothing to keep her from excelling. Failing the leveling meant becoming the property of the man who taught her the very meaning of pain.
It would have also made her mother's sacrifice for nothing. With the test date closing in, Rayah learned that she was able to use her powers at an elite level, but even though that meant she had power, it made her chances of leveling impossible. There was no way that she'd be able to prove her worthiness now. The standard colors of a Lytonians powers are white, royal blue, and turquoise blue. Rayah's were black.And she could only use them in the dark.