I read this book and the other four in the trilogy many years ago and have been reading them over and over ever since. It stars Arthur Dent and his alien friend Ford Prefect who narrowly escape certain death when Earth is destroyed to make way for a hyperspace bypass. From the alien space ship they just hitch hiked a lift with, they begin their many adventures across the Galaxy, eventually meeting the infamous Glactic President, ZB and his two heads! A throughly enjoyable read, it will have you laughing from cover to cover.