Have you ever wondered how a great idea becomes a book? Or even how a really crummy one does? Did your mother try to make you stop asking by telling you a story that starts, "Well, when an author loves an editor very, very much . . ." or just blushing and handing you a copy of Our Chicago Manuals, Ourselves? We're not so shy. Here's the heartwarming, only slightly messy, and roughly 74 percent ac