I would like to add that, having read them all, I also believe that this is the funniest of all his books. I laughed way more often and much louder than at any point of THHGTTG. That reminds me that I have to reread the section where he describes German tourists in his group (I'm German)...

Seriously, if you are thinking about giving a book as a gift to someone and can't think of which one to choose, this one is as safe as it gets.