Banned Books Week is an annual celebration of the freedom to read. It began in 1982 in response to widespread censorship of books, and since that time over 11,000 books have been challenged in communities throughout the United States.
The American Library Association's Office for Intellectual Freedom has been documenting cases of challenged and banned books since 1990, and the ALA's Library Bill of Rights strongly supports free and unfettered access to information and ideas.
An illustration of the extent of the phenomenon is the remarkable fact that of the 88 titles featured in the Library of Congress' 2012 exhibition, Books That Shaped America, 30 have been challenged or banned at one time or another.