The Colour of Magic

In a world that rests on the shell of a giant turtle, a cheerful, high-spirited and incredibly eccentric expedition sets off on its journey. You will meet the miserly and utterly incompetent wizard Rincewind, the naive tourist Twoflower, whose Luggage runs after him like a dog on hundreds of little legs, dragons that exist only if you truly believe in them, and of course, you will travel to the very edge of this strange planet.