The book starts with the descriptions of the movie by Stanley Kubrick "Odyssey 2001" (http://www.imdb.com/title/tt0062622/?ref_=fn_al_tt_1). the writer says how he with S. Kubrick arranged the film script, found the cast and suggested decorations for the art studio to make. It lasted nearly 4 years to film the movie.
then comes the story which the author didn't include into [b:2001 A Space Odyssey|70535|2001 A Space Odyssey (Space Odyssey, #1)|Arthur C. Clarke|https://d202m5krfqbpi5.cloudfront.net/books/1348775483s/70535.jpg|208362] because 2001 novel was written only for the movie. here the ship Discovery goes to Jupiter and finds there not a big black monolith but a pyramid. One of the crew was killed. The others found the Star Gate through which one can travel to the alien worlds. But eventually the happy end came unlike the 2001 book when Discovery goes for no return.