PrimeWire

You might be interested to learn that there is actually a final chapter of the novel which was excluded from the US print editions, and Kubrick had never seen this chapter when he made the movie. In it, Alex sees the error of his ways and seeks to redeem himself on his own power, and not due to the coercion of the Ludvico technique. The movie is fairly faithful (at least chronologically and thematically) to the novel, but because Kubrick read the US version he ended the film as the US print editions did: with Alex relapsing into his old ways and getting ready for more of the ol’ ultraviolence.
I doubt Kubrick reading the last chapter would’ve changed much about the movie, however. He really didn’t like to give the audience closure in any of his films.

This one ain’t for everyone, as with all of Kubrick’s movies. They’re almost all based on books and all have embedded psychological, metaphysical, and/or political meaning. You have to be prepared from the beginning to decipher what the hell Kubrick is trying to say, with knowledge that you’ll never find out the “correct” answer. It can be great conversational fodder, though. I like talking to people about what “2001” or “The Shining” were supposed to mean.