Small Gods: A Novel of Discworld (Discworld, 13)

Lost in the chill deeps of space between the galaxies, it sails on forever, a flat, circular world carried on the back of a giant turtle

Discworld

a land where the unexpected can be expected. Where the strangest things happen to the nicest people. Like Brutha, a simple lad who only wants to tend his melon patch. Until one day he hears the voice of a god calling his name. A small god, to be sure. But bossy as Hell.