After The Adventures of Huckleberry Finn was published in 1885, the book was boycotted in some places in the United States for portraying friendship between a black man and a white boy."In its time, it was derided and censored," said Deborah Caldwell-Stone, deputy director of the American Library Association's Office for Intellectual Freedom, which tracks challenges to books.Today, Mark Twain's classic - about a boy who flees his abusive father and travels down the Mississippi River with an escaped slave - is still sometimes challenged in American schools, but for nearly the opposite reason: its liberal use of the N-word...