Per Anhalter durch die Galaxis

One normal day, Arthur Dent learns by chance that the destruction of Earth is imminent: it is to make way for a hyperspace bypass. Fortunately, his best friend turns out to be an alien who hitchhikes her onto a spaceship and saves her. At least for now. Because before they find out the answer to the question of life, the universe and all the rest, they have to survive the most unlikely planet there ever was, together with the moronic president of the galaxy and a melancholy robot. The first volume of the intergalactic cult series "Hitchhiking through the Galaxy".