Check out this blog's contribution to Banned Books Week, September 25 - October 2. "Think for Yourself and Let Others Do the Same" was the American Library Association's slogan this year.
Lord of the Flies by William Golding on the list of "Frequently Challenged" books was one of my favorite books in literature class way back when.
I remember watching the movie version of Clockwork Orange, also on the "Frequently Challenged" list of books, at Carib theatre in Jamaica in 1976 or 77. I remember it being very bizarre and very interesting. This book written in the 1960s and set in Britain, falls in the category of Dystopic fiction.
Go read and think for yourself and let others do the same.