Writing a novel was like I had some Play-Doh to work with and could just keep working with it - doing a million drafts and things changing radically and characters appearing and disappearing and solving mysteries: Why is this thing here? Should I just take that away? And then realizing, no, that is there, in fact, because that is the key to this. I love that sort of detective work, keeping the faith alive until all the questions have been sleuthed out.