One of the things that did intrigue me about when I read the pilot - because I had not read the books before doing the show - was the mystery aspect of it. I didn't feel that it was just a crime-based story. It really does have that mystery element, and it felt like a throwback to other shows in the past that had a bit more of that. There was something iconic about it. The fact that it's set in Boston gave it a feeling that was different to me. So, I am definitely more of a fan of mysteries than I am of a circular crime-based genre.
