What is the difference between a banned or challenged book?  According to the American Library Association, "A challenge is an attempt to remove or restrict materials, based upon the objections of a person or group. A banning is the removal of those materials. 

 While books have been and continue to be banned, part of the Banned Books Week celebration is the fact that, in a majority of cases, the books have remained available. This happens only thanks to the efforts of librarians, teachers, students, and community members who stand up and speak out for the freedom to read."