The Zero Blessing — Christopher G. Nuttall

Caitlyn Aguirre should have been a magician. Her family certainly expected her to be a magician. But by the time she reached her twelfth birthday, Caitlyn hadn't even managed to cast a single spell! In desperation, her parents send her - and her magical sisters - to Jude's Sorcerous Academy, her last best chance to discover her powers. But as she struggles to survive her classes without a single spell to her name, Caitlyn starts to uncover an ancient mystery that may prove the key to her true powers ... ... If she lives long enough to find it.