What states banned Huckleberry Finn?

Can you clarify for me the context of the phrase "What states banned Huckleberry Finn?"? Are you referring to the novel written by Mark Twain, "The Adventures of Huckleberry Finn"? If so, it's not common knowledge that any states have banned this literary work. Could you perhaps be referring to challenges made to the book in certain school districts or libraries due to its language and depiction of certain themes? Or is there another angle I'm missing? I'd be happy to discuss the history and potential reasons behind any such challenges or bans, if that's what you're interested in.