This was OK. It was interesting but a bit awkward for Kristy to learn about and become passionate about the First Amendment while the controversy felt a little too non-specific, about censorship of books in general rather than particular books.
The references to past books/events was a bit much but pretty nice. The story with Cary was OK, amusing for Kristy (Mystery-style) to consider him a criminal (and be confused that otherwise he seemed pretty decent), but a little repetitive (and her anger at him for not telling her offense, arguably, wasn't as bad as she thought was pretty unlikeable) and then just ended abruptly.
I think it would have been more interesting if Kristy had selected and did read The Catcher in the Rye, it's interesting to imagine what her reaction would be. Maybe she would dislike Holden and the book and still not want it to be censored.