The world is flat. It rests on the back of four giant elephants, who in turn stand on the back of great A'Tuin, the only turtle to form the basis of an entire branch of astrophysics.Events on the Discworld have been chronicled in the best-selling works of Terry Pratchett. Fans have learned of the adventures of Rincewind the incompetent wizard, Granny Weatherwax the witch (known to trolls as "She Who Must Be Avoided"), Captain Carrot the six-foot dwarf, Archchancellor Ridcully, Susan Sto Helit (granddaughter of Death), and a cast of strange and unique characters.