SourceryThe fifth Discworld novel, revamped for a new generation of readers 'May well be considered his masterpiece . . . Humour such as his is an endangered species' The Times The Discworld is very much like our own if our own were to consist of a flat planet balanced on the back of four elephants which stand on the back of a giant turtle, that is . . . All this books and stuff, that isn't what it should all be about. What we need is real wizardry. Once