Hitchhikers Guide to Galaxy 2nd enrty

Arthur comes home and he sees his house getting demolished by bulldozers.  He starts screaming at the people doing this and describing how he will kill them in great detail.  They start running away and Arthur thinks they are running away from his so he starts chasing them.  After chasing them for about 30 seconds still yelling at them he trips and falls on his back.  He then sees what they are really running away from, in the sky there are huge yellow machines coming over them.  Soon every speaker, stereo and anything that can produce sound automatically turns itself on.  It announces that they are from another planet and their planet is making a hyper speed bypass.  Apparently earth is in the way so they have to demolish earth.  Everybody starts running around franticly screaming.  Then the pa system says that they had told them 50 years in advanced that this would happen because the planning charts and orders were on a place called Alpha Centuri.  No one on earth had read the warnings.
The chapter ends like that and then in the next chapter it skips to a new planet, Damogram. It describes this place as "the secret home of the Heart Of Gold".  It is a deserted planet with several dessert islands.  This planet was chosen because it has very little people on it therefore it can be a more secretive place.  An alien named Zaphod Beeblebrox is riding in a boat on the planet.  He is talking about how he is running for president.  He is running for reasons that are questionable but have not be revealed.
I am finding this book very interesting mostly because of the action although it is hard to follow.  I am looking forward to seeing what will happen to earth.