There Was An Eighth Son Of An Eighth Son. He Was, Quite Naturally, A Wizard. And There It Should Have Ended. However (For Reasons We D Better Not Go Into), He Had Seven Sons. And Then He Had An Eighth Son& A Wizard Squared&A Source Of Magic&A Sourcerer. Sourcery Sees The Return Of Rincewind And The Luggage As The Discworld Faces Its Greatest And Funniest Challenge Yet.