Beautiful Chaos by Kami Garcia
For Ethan, the chaos is a frightening but welcome distraction. He's being haunted in his dreams again, but this time it's not Lena -- and the mysterious figure is following him out of his dreams and into his everyday life. Worse, Ethan is gradually losing pieces of himself -- forgetting names, phone numbers, even memories. He doesn't know why, and he's afraid to ask.
Sometimes there's no going back. And this time there won't be a happy ending.
SPECIAL BONUS: Includes "Dream Dark," a thrilling short story set before Beautiful Chaos. When Link joined his best friend, Ethan Wate, on a quest through a mysterious network of underground passageways endlessly crisscrossing the South, he knew the journey would be dangerous. But he had no idea it would change his life forever.