Night Nation

Candle Enys is no longer human.
A demon owns her soul, and the only way to set things right is to travel to the one place no human should ever go: the Night Nation. Where the dead roam, and spirits flood the sky. Where monsters hold court and the very land itself might wake at any moment.
With her wings, her magic, and her wits, Candle must find the demon and kill him, all the while contending with the denizens of the Night. New friends, foes, and complicated family history await—if only she can catch her breath.
The Night Nation is full of dreams and promise, but does Candle belong there?
A dark young adult fantasy with progression elements.