If I'm being honest with myself, I would say that the ads for the upcoming Sherlock Holmes movie has been a factor. That, and re-reading Asimov's Elijah Baley novels.
The basic premise is one of importing the murder mystery novel/police procedural into a fantasy world. Which works, if it still stays focused on character. I'm not going to break my arm patting myself on the back, but I think I have that with Katrine Casey and Minox Welling.
But we'll see over the next couple months how that comes together.