September 29 through October 6 is “Banned Books Week.” For more on this topic see http://ala8.ala.org/ala/oif/bannedbooksweek/bannedbooksweek.htm and http://www.npr.org/templates/story/story.php?storyId=95190615 This second site tells some of the story of banning Grapes of Wrath in Kern County in 1939.
