The Light Fantastic - Terry Pratchett - Bog

It's just one of those days when nothing seemsto go right?a most inopportune time for thefirst tourist ever to set foot (and carnivorous Luggage) on the Discworld to be extending his already eventful vacation. (Not that he currently has much choice in the matter.) But with a monstrous red star on a direct collision course, the future for the residents of this flat planet carried by four elephants riding on the shell of a giant turtle swimming through space appears uncertain at best. Fortunately, there is one individual who can save Discworld from total destruction. Unfortunately, that hero happens to be the singularly inept wizard Rincewind, who was last seen falling off the edge of the world.