To put it in a nutshell, they are the funniest books ever written, period. When I first got these, I couldn't read them in a public place in fear of laughing uncontrollably and making a spectacle of myself. I adore these books, they're the type I can read over and over again without the jokes seeming old. It's not just any humour, it's Douglas Adams humour, which has the type intelligent, nerdy , geeky, random, quotable, and just generally perfect humour I adore. Although it seems light and fluffy, if you squint it does raise some philosophical questions. If anyone is considering buying them, do. You won't regret it. You'll never look at a towel, a cup of tea, the number 42 or a sofa without giggling to yourself again.