You can enter by following the link to the Facebook page here:
It looks like a terrific read- Emily is happily married, with a beautiful family and a lovely home until the day she walks away and starts life over as Cat, working at a hip London ad agency. Why did Emily do that and will she be found out?
Fans of Gone Girl, Before I Go To Sleep and The Silent Wife will love this intriguing story. Enter to win and let all your friends know about the contest. Good luck!