Discworld

In a world supported on the back of a giant turtle (sex unknown), a gleeful, explosive, wickedly eccentric expedition sets out. There's an avaricious but inept wizard, a naive tourist whose luggage moves on hundreds of dear little legs, dragons who only exist if you believe in them, and of course THE EDGE of the planet...

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...