A new psychological thriller from Mark Lukens.

What is the truth? What is reality?

Twenty-six-year-old Zach Hughes and his wife Michelle were just hoping to have a nice dinner at a restaurant on a Friday evening. As Zach is seated at the table, Michelle goes to the restroom.... She never comes back.

After a frantic search, the only thing Zach finds is his wife's purse in the bathroom with her keys, money, and cell phone inside. The only witness is an elderly woman who saw Michelle leave with a man. Zach believes his wife was taken.

The police are called, but they get nowhere, believing Michelle left Zach. The next morning, Zach is questioned by two detectives who believe he did something terrible to his wife. With no police help, Zach begins searching for his wife, unearthing clues. As he digs into her past, he finds that she's led a secret life.

Every night since Michelle's disappearance, Zach wakes up to find himself fully dressed, the lights on in his house, and his front door unlocked. Has he been sleepwalking? He's never done that before. Could it be connected to his wife's disappearance? He films himself while he sleeps to see where he goes while sleepwalking, to see what he does.

What he sees on the video scares him to death...and it's only the beginning.

Pick up Sleep Disorders and discover the terrible secrets along with Zach.