From Snuff 'Vimes' prompt arrival got a nod of approval from Sybil, who gingerly handed him a new book to read to Young Sam. Vimes looked at the cover. The title was The World of Poo. When his wife was out of eyeshot he carefully leafed through it. Well, okay, you had to accept that the world had moved on and these days fairy stories were probably not going to be about twinkly little things with wings. As he turned page after page, it...