phenomen a book

Elia is stuck in the maze, a near endless construct filled with undead & undeader. Rye is stuck inside her own head. Elia has the steering wheel for everything else you see, and she''''s adamant on driving her way. There''''s a very easy road they could go down, where they fight over their body and sabotage each other all the way to Loften. Except, well, Rye''''s too nice for that, and Elia doesn''''t want either of them to die. Maybe they can be friends instead?