I did enjoy this book, however it was pretty gruesome. The flashbacks to the time that Archie was being held by Gretchen are pretty gross and disturbing. I was cringing as I was listening. I liked Archie. He is a good cop, but he is majorly flawed. He is addicted to painkillers and still has serious issues from his torture. I'm not sure I liked Susan, the journalist. She seems to immature for her age and profession. Maybe she will grow on me as I get further into the series. 
 The hunt for the killer was intriguing. It wasn't obvious to me who it was and that made it worth listening to . I liked the little twist toward the end and how everything tied together. This is the first in a series of 5 books. If you are looking for a good thriller with very flawed characters, give this one a try.