It"s a rat-eat-rat world . . . Every town on Discworld knows the stories about rats and pipers, and Maurice - a streetwise tomcat with his very own plague of rats - has the perfect insider-dealing scam going. Until he runs across someone playing a different tune. Now he and his rats must learn a new concept: evil. And it"s time for everyone to stop relying on stories and to start using independent thought . . .