For every Pratchett fan, the must-have fully updated guidebook to Discworld The Discworld, as everyone knows, is a flat world balanced on the backs of four elephants which, in turn, stand on the shell of the giant star turtle, the Great A'Tuin, as it slowly swims through space. It is also a global publishing phenomenon with sales of nearly 85 million books worldwide (and counting). With 39 books in the canon, not including the various guides, maps,...