The Last Oracle. Oonagh Dark Series, #1

Seventeen-year-old Oonagh Dark has always known she was different-too strange for the mortal world and too mundane for her Aunt's society. A witch-fae hybrid with a mysterious past, she's spent her life hidden in her cruel aunt's estate, silencing her power and scrubbing floors. But when a shadowed figure begins stalking her dreams and a real-world threat forces her to flee, Oonagh finds herself in the enchanted land of Elphynne.
There, she's swept into a kingdom of magic and lore.  She is drawn to Prince Cillian, a golden-haired warrior with a tragic past and a promise of safety. But love, like magic, is rarely simple, and destiny has other plans. Hunted by Danko, a dark warlock who will stop at nothing to claim her as his bride and harness her power, Oonagh must choose who to trust, who to fight for, and who she truly is.
When she meets Aspen-a fierce, brooding werewolf with eyes that see into her soul-she begins to unravel secrets even her heart wasn't ready for. Power. Love. Freedom. To claim any of them, Oonagh must first survive.