Below is the Top Ten List of Frequently Challenged Books, as compiled annually by the American Library Association Office for Intellectual Freedom. OIF collects reports on book challenges from librarians, teachers, concerned individuals and press reports.
A challenge is defined as a formal, written complaint filed with a library or school requesting that a book or other material be restricted or removed because of its content or appropriateness.
In 2012, OIF received 464 reports on attempts to remove or restrict materials from school curricula and library bookshelves. This is an increase from 2011 totals, which stood at 326 attempts.