The darkness was still thick when that sound tore Tessa out of her sleep. It wasn’t a scream. It was something worse. A wet, raspy noise, like someone choking. Then came a short, strangled groan.

Tessa shot upright, her heart pounding wildly. Moonlight spilled faintly over the sofa near her bedroom window.

She switched on the bedside lamp, and froze.

Tyler was curled up on the floor, his body jerking violently. He was throwing up dark, thick liquid that smelled sharp, like acid mixed ...