

An idea that is not dangerous is unworthy of being called an idea at all.
--Oscar Wilde
American
Library Association's page on Banned Books Week - Banned Books Week
typically occurs in September. Watch for updates.
Report
a challenge to ALA online.
The 100 most challenged books 1990-2000 - Out of 6,364 challenges reported to or recorded by the Office for Intellectual Freedom, as compiled by the Office for Intellectual Freedom, American Library Association. The ALA Office for Intellectual Freedom does not claim comprehensiveness in recording challenges. Research suggests that for each challenge reported there are as many as four or five which go unreported.
American Booksellers Foundation for Free Expression (ABFFE) - "Founded by the American Booksellers Association in 1990, ABFFE’s mission is promote and protect the free exchange of ideas, particularly those contained in books, by opposing restrictions on the freedom of speech; issuing statements on significant free expression controversies; participating in legal cases involving First Amendment rights; collaborating with other groups with an interest in free speech; and providing education about the importance of free expression to booksellers, other members of the book industry, politicians, the press and the public."
Freedom to Read - Our neighbors to the north also have to deal with book censorship. This site is devoted to the right of Canadians to decide for themselves what to read.
Banned Books & Novel Ideas - An English course website for the University of Texas at Austin.
National Coalition Against Censorship - "The National Coalition Against Censorship (NCAC), founded in 1974, is an alliance of 50 national non-profit organizations, including literary, artistic, religious, educational, professional, labor, and civil liberties groups. United by a conviction that freedom of thought, inquiry, and expression must be defended, we work to educate our own members and the public at large about the dangers of censorship and how to oppose them."
"The Most Frequently Banned Books in the 1990's" - Taken from the table of contents of Banned in the U.S.A. by Herbert N. Foerstel.
The Censorship Pages - Includes information on Banned Books Week, as well as information on other types of censorship--including censorship of the web. By Books A to Z.
The Online Books Page: Banned Books Online - Full text of books that have been the objects of censorship or censorship attempts. The books featured here, ranging from Ulysses to Little Red Riding Hood, have been selected from the indexes of the On-line Books Page.
Information on the Index Librorum Prohibitorum, or "The Index" - This is not a comprehensive list of books on the Index, since there have been many versions published over a period of several hundred years. However, it's a great resource.
Book Censorship - A general list of links, like this one.
He who destroyes a good Booke, kills reason it selfe - A 1955 exhibition at the University of Kansas Library of books "which have survived Fire, the Sword and the Censors." The exhibit catalog was originally published in 1955, at the height of the McCarthy era. It includes information on censorship in the United States and from around the world. This is a great source of information on banned literature of ages past.
The File Room - This nifty site is not limited to literature but includes art, fashion, broadcasting, etc. You can choose to view cases of censorship by date, location, grounds for censorship, or medium. Need to find a banned painting? Go to the Archive and choose "medium." Need to find out about censorship B.C.? Choose "dates."