Book — A.B. Poranek

Raised in a small village near the spirit-wood, Liska Radost knows that Magic is monstrous, and its practitioners, monsters.
After Liska unleashes her own powers with devastating consequences, she is caught by the demon warden of the wood - the Leszy - who offers her a bargain: one year of servitude in exchange for a wish.
Whisked away to his crumbling manor, Liska makes an unsettling discovery: she is not the first person to strike this bargain and all of her predecessors have mysteriously vanished. If Liska wants to survive the year and return home, she must unravel her host's spool of secrets and face the ghosts of his past.
Those who enter the wood do not always return . . .