Last week I attended the one day Cape Fear Crime Festival in NC and one of the speakers was Chris Roerden, a contract editor now, with something like 44 years in the business, who's written the non-fiction and winner of the Agatha Christie for Best non-fiction book, DON'T MURDER YOUR MYSTERY, and the follow-up, DON'T SABOTAGE YOUR SUBMISSION. Chris is a delightful speaker and I bought a copy of D…