Draw Down the Moon - Moonstruck #1 by P.C. Cast

Wren Nightingale isn't supposed to have any powers. Born of magickal parents but not under a moon sign, she was destined for life as a Mundane-right up until she starts glowing on her eighteenth birthday. In a heartbeat, Wren's life is turned upside down, and she's suddenly leaving her home for the mystical Academia de la Luna-a secret magickal school on a hidden island off the Seattle coast.

Lee Young has always known about his future at the Academia. He has one goal: pass the trials, impress the Moon Council, and uphold his family's reputation. But he wasn't expecting to be attending alongside the girl he's been secretly in love with for as long as he can remember.

As Wren and Lee are thrown into the Academie's grueling trials, they quickly learn there's something different--and dangerous--about the school this year. Wren will have to navigate a web of secrets, prophecies--and murder. And Lee will have to decide who to protect--his family's legacy, or the girl he loves.