As a person who suffers with insomnia, this book spoke to me!
The main character Thea was likeable and I totally understood the feelings of delirium when she hadn't slept!
I was so intrigued by the premise of the sleep trial and loved the mystery surrounding the clinic and the patients. It was a great thriller, and I enjoyed it.
I listened to the audiobook and the narrator was fantastic, keeping me engaged most of the time and eager to find out the next events. I did lose track of some of the characters a few points though.