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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 who have been eating wizards' rubbish and can now talk. Smart enough to get a pretty amazing idea when he spots a stupid-looking kid playing the flute...
Now Maurice has his very own 'plague of rats' - and his own Pied Piper. And his money-bags are getting fuller and fuller. Until the group reach the farflung village of Bad Blintz...