Satanic Shadows by Leigh Rivers

HE WAITS

Seraphine Winters had a normal life. One she misses when she's kidnapped and taken to an island in the middle of nowhere.

Forced to attend Quarrierton Academy, a castle full of immortal beings, the only way she can leave is if she passes all her classes. But as a human, she's hated just for breathing, with no way to fit in around magic and powers she never knew existed.

And who doesn't hate mortals more than Dane Dalton? The Shadow Prince loathes everything about her, yet there are more secrets and lies than truths between the pair, and it's a race against time when the curse is revealed.