Is Discworld ready for educated rats? Set in the Discworld, a brand new and marvellously eccentric fantasy tale for young readers. Maurice, an amazing cat, who has survived four years on the toughest streets in the whole of the Discworld, reckons that rats are dumb. Clever, OK, but dumb. Maurice, however, is smart -- smart enough to recognize that there’s a new kind of rat around; rats that have been eating wizards’ rubbish and can…