Sing Sweet Nightingale — Erica Cameron

Seventeen-year-old Mariella hasn't said a word in four years, and it's not because she can't: it's because she won't. She has nothing to say because no one would believe there's a world she can only visit in her dreams. And no one would understand why Mariella promised her silence to Orane, the "man" who introduced her to this world.

Hudson is only eighteen, but he's survived a lot--including a run-in with creatures he calls the dream demons, creatures he blames for the recent death of his four-year-old brother. Struggling to cope in the aftermath of this loss--and guided by signs even the practical Hudson can't ignore--he moves to a new town and comes face-to-face with the one thing he never thought he'd see: another victim of the demons.

Mariella and Hudson have both been chosen by demons from a world that exists within ours, a world where beauty and magic mask cruelty and greed. Hudson has seen the gruesome reality of these beings, but Mariella is still in their thrall. She's in love with her captor, Orane, and is convinced she doesn't need saving. It's up to Hudson to show her the truth about the demons before she's lost in their world forever.