A shade of blood
(Book)

When Sofia Claremont was kidnapped to a sunless island, uncharted by any map and ruled by the most powerful vampire coven on the planet, she believed she'd forever be a captive of its dark ruler, Derek Novak. Now, after months of surviving an endless night, the morning sun may soon rise again for Sofia. Something has possessed Derek's heart and he offers her a gift no human slave has ever been given in the history of his cursed island: escape. High school, prom and a chance to move on with her life now await her. But will she be able to forget the horrors that steal her sleep away at night? ... or the feelings that haunt her for that tormented prince of darkness?