For me... hmm, I guess Three Men in a Boat and Three Men on the Bummel by Jerome K. Jerome, basically anything by Gerald Durrell, Little Nicholas by Goscinny and The Devil's Dictionary by Ambrose Bierce.
I only really like the first two...I thought after that they started to go a bit downhill. Good...but not *as* good
Kurt Vonnegut - Slaughterhouse 5 or Breakfast of Champions or Cat's Cradle they are all hallarious, and serious at the same time. Vonnegut is awsome!
Fear And Loathing in Las Vegas (Much better than the film) Catch-22 Scanner Darkly by Philip K Dick (quite a serious and sad book but has some hilarious moments in it).
Rayuela by Julio Cortázar is the one book that satisfies me in every possible way. Loud laughters all the time.
Usually, I don't read books for entertainment, but the book that made me laugh the most (although it isn't supposed to be a comedy) was Dennis Rodman's autobiography, "Bad as I Wanna Be." It was hilarious as hell.
robert a heinlein's _job: a comedy of justice_ joseph heller's _god knows_ ernest brahmah's __the golden hours of kai lung_ james thurber's _fables for modern man_
Terry Pratchet rulez I didn't know Fear and Loathing in Las Vegas (the movie) came from a book, could you tell me the author? I liked the movie very much, great job by the actors, and got so much fun. And finally, did you read Rayuela in English or in original Spanish, i mean translating Cortazar to english must be very hard, because of most of the expessions aren't not easy in spanish so i cannot imagine in English. And have you read trainspotting? not a comedy at all, but has really funny moments. remember the power of a waiter, watch out with that
Hunter S. Thompson wrote it, Johnny Depp plays him in the movie. I thought The Electric Cool-Aid Acid Test-Tom Wolfe, was pretty damn funny as well. So was Under the Roofs of Paris by Henry Miller--it's like reading really funny porn.
I'd have to agree that the Hitchiker's Guide to the Galaxy is great. The others in the series are good too, but the first is a classic.