Arthur Dent goes on a galactic tour with friends Ford Prefect (we had this car at one time, 1955 make) and Slartibartfast, and they encounter white robots this time instead of mice who conspired to run the universe last time around (in a previous book). They are hell-bent on destroying everything, like a James Bond villain.
The story involves a game of cricket, cave-dwelling, space travel, and everything in between. The wisecracks keep you going, and Zaphod Beeblebrox and his vanishing girlfriend (Half-Girlfriend?) make an appearance too.
Enjoyable if you like completely whimsical stuff of the intergalactic kind.