Sure, the book is bizarre with strange jumps in logic as well as creatures and events that are so alien yet so familiar to our society. Yet the story of the lost Arthur Dent obtusely moving around the galaxy (and multiple dimensions) while managing to have an impact on it strongly reminded me of the island travels of Lemuel Gulliver. Adams is a modern Swift, mixing satire in with adventure all while poking fun at the world (and its politics).
I often found myself laughing out loud while reading this series. Frequently, I repeated elements that I found amusing to anyone who was near. By far, my favorite book was the fourth one--So Long and Thanks for All the Fish. Yet I'm also glad that it didn't end there.
I have not read, and probably never will read, the appended book to Dent's adventures that was written after Adams passed away. To me, the five books felt complete. Sure there were questions left unanswered, but the series managed to come full circle by the end in a way that both set my teeth on edge and felt satisfying.
I recommend reading the book if you have not. I only suggest that you don't take it too seriously ... but I still think it should be taken seriously.