Cayla Kluver - The Queen's Choice (Heirs of Chrior #1)

Magic was seeping out of me, black and agonizing. I could see it drifting away. The magic that would let me pass the Road to reach home again.
When sixteen-year-old Anya learns that her aunt, Queen of the Faerie Kingdom of Chrior, will soon die, her grief is equalled only by her despair for the future of the kingdom. Her young cousin, Illumina, is unfit to rule, and Anya is determined not to take up the queen's mantle herself.
Convinced that the only solution is to find Prince Zabriel, who long ago disappeared into the human realm of Warckum, and persuade him to take up his rightful crown, Anya journeys into the Warckum Territory to bring him home. But her journey is doomed to be more harrowing than she ever could have imagined.