Ellie has a problem. The monster in her dreams has come to life.

Dr. Ellie Thompson has always been haunted by her nightmares. But now they're bleeding into reality. She wakes to find there really is glass in her foot, a knife under her pillow.

How is this possible? Is she sleepwalking?

When threatening messages appear on her phone and then vanish, when incidents she vividly recalls prove to be imaginary, Ellie begins to wonder if there is something more sinister afoot. Is someone doing this to her, trying to drive her mad?

As her grip on reality slips away, Ellie suspects everyone around her. Her distant husband with his unexplained absences. Her obsessive ex who can't let go. Even her psychiatrist, whose connection to one of her own medical cases raises disturbing questions.

As Ellie fights to discover if these terrors come from inside her own mind or from someone outside, she will finally draw close to the truth. A truth more horrifying, more shocking, than even the worst of her nightmares…

The Sleepwalker – the shocking psychological thriller perfect for fans of Lisa Jewell, Daniel Hurst and John Marrs.