I enjoy thriller and suspense books, especially psychological thrillers. My first look at this book left me wondering more about the characters and how suffering from insomnia will affect the storyline. I'd be interested in reading more. However, as a psychologist, I wonder if this book may provide a slightly superficial perspective on what insomnia is and how it impacts on people's everyday life. I did not see enough in the first look to provide an opinion on this.