The Unseelie Exile (The Unseelie Shadows Chronicles) by Kathryn Ann Kingsley

One desperate night. Three forbidden seals. And the ruthless fae exile who will claim her soul... Ava Cole thought rock bottom was losing her mother and being cast out by her father on the same cruel day. Until she followed enchanted lights into the midnight woods—and walked straight into the claws of the Unseelie. Now she's trapped in a prison between realms. Her captor? Serrik—a devastatingly powerful fae outcast with vengeance burning in his veins and eternity to make her suffer. Cold. Merciless. Intoxicating. His touch sears her blood. His golden eyes haunt her dreams. And with each forbidden lesson, each impossible task, Ava finds herself craving the very being who plans to use her as a weapon of magical destruction. In this twisted realm of exiled fae who hunger for her blood and power, Ava's greatest battle isn't the magic she must unleash—it's the treacherous desire threatening to consume her soul. Because in Serrik's deadly web of shadows, the line between enemy and lover vanishes like mist. But through all the twisting mirrors and illusions, one thing becomes clear— She can trust no one but herself. Read more