The first mystery I wrote, Doubletake, was a collaboration with a woman who was … how can I put this delicately…very hard around the edges. Margaret had been around the block more than a few times and could hold her own with any sailor or truck driver when it came to colorful language. At that time, I was a mother of young children who had worked hard to never say anything harsher than "hell" lest my little darlings hear things they shouldn’t. The way Margaret and I worked on the book was to each write a chapter and then get together to trade pages and  add our touch to what the other had written. Margaret looked over my first attempt to write something from the killer’s point of view and said, “Maryann. A deranged killer is not going to say, ‘Gosh, golly, gee.’ He’s more apt to say, #(#*#*&,  @)*$&$,   #*@&#.” “But I can’t write those words. I’ve never even said them.”  Margaret grabbed me by the hand and took me out behind her barn wh...