As you might guess from the Authors name this is a discworld story but aimed at kids. ( If you have no idea what i am talking about ask your mum or dad.)
Maurice is a cat. A very smart cat. A con cat. He and a bunch of rats. Very smart rats. And a kid with a pipe have the perfect con. Rats run around creating havoc, the kid turns up and pretend to be a piper. The town pay him to get rid of the rats. You get the idea. But this time the rats have found some strange thing happernig. Now they have to lean what EVIL means.
I loved this book. I hope you can read it.