Sworn - Bound Trilogy, #3

Not every fairy tale ends with "happily ever after."The plan was simple: Find Ulric, the lost king of Tyrea, then return him to Luid to reclaim his throne from the tyrant who stole it. But though Aren, Rowan, and Nox accomplished the first part of their task, the rest is proving to be more complicated than any of them imagined. Severn won't give up his throne without a fight. Worse, it seems Ulric did not fare as well during his years in captivity as he's led everyone to believe-and Rowan may not have escaped unscathed, either.
If Nox doesn't find a cure for the king's mysterious ailment, Aren will be forced to challenge Severn for the crown. It's a battle Aren has little hope of winning. And if he does, it will cost him the love and the freedom he's fought so hard to gain.