What a great premise for a suspenseful psychological thriller, but unfortunately the book did not measure up to my expectations. I caught my mind wandering off repeatedly., while the action was crawling along with the handbrake on, and though there did happen a couple of scary things, they drowned in the repetitiveness of dialogues, making it hard to stay focused.
The characters did not really interest me, especially the lead character, detective Carla Herron, remained strangely flat. Her struggle between the time-consuming police work and being a good mother seemed affected and did not convince me. On the other hand, her partner Morton, who stayed silent most of the time and was secretive about his personal life, showed great depth and was the only one who really caught my interest.
Based on a fascinating idea with great potential, its realization and especially the characters sadly failed to deliver. However, I feel that this is a very personal and subjective impression which may not agree with other readers' perception of the book.
(thanks to netgalley, the author, and the publisher for a copy of the book, all opinions are my own)