It was a very disturbing book for a child to endure. There is a time when there should be limits on what a child reads. Anything that will disturb a child's mind should be censored. On the opposite spectrum, there are things not to censor such as, an opinion, or a thought. Maybe someone doesn't like it, but it is their idea.
Censorship means censoring the book.
Not buying it or selling it. Selection means choosing what you want to read. Having and making your own choice.