Under the Skin — Caitlin Ricci

Briar's best friend bets her that she can't spend the night in a creepy haunted house close to campus. Briar intends to prove her friend wrong, but this could end up being one challenge she should never have taken. The house is guarded by a monstrous demon trapped there, and once Briar comes in, she's held by the curse as well. There's only one way to break the spell, but it may be far more than Briar is willing to give, even if it means her freedom.