The Cruel Prince (The Folk of the Air Series) by Holly Black
Jude was just seven years old when her parents were murdered and she and her two sisters were stolen away to live in the dangerous High Court of Faerie. Ten years later, 17-year-old Jude wants nothing more than to belong there, despite her mortality. However, many of the fey despise humans, especially Prince Carden, the youngest and cruelest son of the High King.
This YA fantasy is the first book in the The Folk of the Air Series. The Cruel Prince is an addictive, dark romance that will keep you on your toes.