The idea behind Banned Books Week (September 24-30, 2017) is to remind everyone that censorship is not a thing of a puritanical or prudish past. Unfortunately, books (and other creative works) are still banned, challenged, and removed from the shelves or from curriculums.
Thanks to the work of anti-censorship advocates, raids and arrests at stores, newspapers, and publishers on the grounds of obscenity are exceedingly rare these days. Currently, most attempts to remove books (and other creative works) take place in schools and libraries. This means that teachers and library staff are on the front lines of protecting your First Amendment freedoms.