The Light Fantastic (English, Paperback, Terry Pratchett)

As it moves towards a seemingly inevitable collision with a malevolent red star, the Discworld has only one possible saviour. Unfortunately, this happens to be the singularly inept and cowardly wizard called Rincewind, who was last seen falling off the edge of the world…

THE FUNNIEST AND MOST UNORTHODOX FANTASY IN THIS OR ANY OTHER GALAXY