One Dark Window

In One Dark Window by Rachel Gillig, Elspeth Spindle needs a monster to protect her in the mist-locked kingdom of Blunder. But when she meets the King's nephew on a dangerous quest to cure Blunder of dark magic, she must confront her darkest secret: the monster might be her. With stakes high and attraction growing, Elspeth must gather twelve Providence Cards while fighting the Nightmare taking over her mind.