Glamour of Midnight by Casey L. Bond

Nineteen-year-old Karis has been blind since birth, but for some reason, she can see through the wall of smoke that separates the human lands from those of the Faeries that rule in grand courts on the other side. Most of the time, the only thing she can see on the other side of the wall is the swipe of a tail or the trailing of a bony hand along the surface. But one day, a handsome faerie appears and sweeps her away into his world—a world that is being ravaged by an evil so dark and deadly, she fears she may never see her home again.

Loftin is a bounty hunter and he has been searching for Karis since she went missing from the Court of Ash. He needs to return her and collect the ransom. But the longer they travel together and the more he teaches her about what she is now able to see, the more difficult he finds the thought of letting her go. A fiery passion ignites between them, but with a monster tracking their every move, they must find a way to reach the Court of Ash before it kills them both.