The last week in September is the American Library Association's Banned Books Week, when the ALA highlights books that have been banned and challenged in bookstores, libraries, and schools across the United States. You can check out our list of the most frequently banned science fiction books of the 21st Century, or the ALA's lists of frequently challenged books.
Last year, Philip Pullman's His Dark Materials trilogy numbered among the ten most challenged titles of the year for its religious and political viewpoints, as did Alvin Schwartz's popular Scary Stories series for its violence and references to the occult. Below is the ALA's map of book bans and challenges in 2007-2009, which includes the removal of Robert Heinlein's The Day After Tomorrow (also known as Sixth Column) and Alice Sebold's The Lovely Bones. The ALA believes these represent only a fraction of bans and challenges, as the vast majority go unreported.
View Book Bans and Challenges, 2007-2009 in a larger map