2001: A Space Odyssey
So to start this off, I really REALLY love the book for this film, I feel like it's a story that you really lose urself in, I know I did with its descriptions of space and it's constant question of "who are YOU in the universe". I really like the book.
Onto the movie, I think it adapts it very well! There are some parts that I wish were longer or included, I do think that if you care about the characters the book does them a bit better then the film, esp Hal.
But oh my god the visuals!!!!!! good lord!!!!!!!!!! so good, so good. Need to see and read the sequel soon.