A friend was looking at the title of a book I was reading - Weapons of Mass Destruction : “Is that about what I think it is?” Well, “yes,” I said, and “no.” The book is about American troops in Iraq in 2004. But no, because the book is not an analysis or partisan tract, but a novel. And a novel with two unusual features: It’s a story about a young marine named Billy Sinclair- a well-respected sharpshooter in his unit who’s haunted by the recent suicide back home in Montana of his lifelong friend