Encyclopedia of Censorship - Jonathon Green, Nicholas J. Karolides - Google Books

http://books.google.de/books?id=bunHURgi7FcC

Although censorship may seem like a thing of the past, current controversies over books, movies, and Web sites prove it to be a very timely and critical issue. Fully updated and revised with more than 50 percent new material, Encyclopedia of Censorship