Saw the series first and the book added so much more to the back story of emotions. And the writing was a gift, right from the start - smart, lyrical, hero cops with tragic stories that make them better at what they do but so flawed and scarred yet beautiful. I kept making time throughout the day to get another 1/2 chapter or 4 in. You wanted to read it fast so that the detective could finally catch up to where you thing it is going, even though it doesn’t all go there. Cassie’s side story going undercover is not in this novel.