I actually think you'll get more out of it if you read it first. However, the logistical problem is that you don't want to read it in a hurry. It's worth remembering that it was a serial, and it was intended to be experienced slowly and thought about. It's a pretty thinky book. Indeed, it's in some ways a challenging book. If you see the movie first, it's like doing an easier version of a crossword: when you turn to harder crossword, a chunk of the challenge is removed, and with it part of the pleasure of doing it.
In particular, almost all the characters harder to like in the book, which is why it's interesting to the reader as we come to empathize with them as we get to know them. Because they're easier to like in the movie, when one subsequently encounters them in the book, they're "old friends", and one is cheated out of the experience of getting to know them them hard way -- which is part of what made the book interesting and important.
Similarly, there is a very deep and important thematic change between the book and the movie, and I expect that if one sees the movie first, one will have trouble seeing past the movie to perceive the different point in the book.
ETA: Which is to say, it's apparently perfectly possible to see and enjoy this movie cold, but the work you'll be enjoying is a much shallower one, providing a much shallower enjoyment, than if you read the book first.
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In particular, almost all the characters harder to like in the book, which is why it's interesting to the reader as we come to empathize with them as we get to know them. Because they're easier to like in the movie, when one subsequently encounters them in the book, they're "old friends", and one is cheated out of the experience of getting to know them them hard way -- which is part of what made the book interesting and important.
Similarly, there is a very deep and important thematic change between the book and the movie, and I expect that if one sees the movie first, one will have trouble seeing past the movie to perceive the different point in the book.
ETA: Which is to say, it's apparently perfectly possible to see and enjoy this movie cold, but the work you'll be enjoying is a much shallower one, providing a much shallower enjoyment, than if you read the book first.