A lot of very strange things can, and do, happen on a world that is flat, and is carried on the backs of four elephants perched upon the shell of the great turtle A'Tuan. Terry Pratchett's world and stories seem, on the surface, to be plainly fun. And they are that. Lighthearted and amusing, his stories don't feel heavy, but despite their facade, they in many cases convey unexpected significance. The well-meaning Watch Captain Vimes does just that as he investigates a dwarfish murder.