I recommend seeing the movie first, if you haven’t read the book. And then, treat yourself to a copy of the book, which, while the film has some of the wit, presented in a form with is pleasing to both the eyes and the ears as well, does not have the same lasting impression as the written word on the imagination. It’s a shame they didn’t just do the entire five part Hitchhiker’s trilogy all at once, because alone without promise of more, it barely has legs, aside from the fact that we know there is more to come. At least you can read the rest, but do yourself a favor and read the first book as well, because there are great scenes with witty banter that would have played out spectacularly on film, and I think I could have done a much better job interpretting this for the screen. A complimentary Lord of the Rings style film, this is not.