Banned Books Week (September 22-28) is an annual event celebrating the freedom to read and the importance of the First Amendment. Held during the last week of September, Banned Books Week highlights the benefits of free and open access to information while drawing attention to the harms of censorship by spotlighting actual or attempted bannings of books across the United States. Read more about Banned Books Week. Read the Oregon Intellectual Freedom Clearinghouse 2013 Annual Report (pdf). Most Challenged Books in 2012 Out of 464 challenges to the Office for Intellectual Freedom, these were the most challenged: Captain Underpants (series), by Dav Pilkey. Reasons: Offensive language, unsuited for age group. The Absolutely True Diary of a Part-Time Indian, by Sherman Alexie. Reasons: Offensive language, racism, sexually explicit, unsuited for age group. Thirteen Reasons Why, by Jay Asher. Reasons: Drugs/alcohol/smoking, sexually explicit, suicide, unsuited for age group. Fifty Shades of Grey, by E. L. James. Reasons: Offensive language, sexually explicit. And Tango Makes Three, by Peter Parnell and Justin Richardson. Reasons: Homosexuality, unsuited for age group. The Kite Runner, by Khaled Hosseini. Reasons: Homosexuality, offensive language, religious viewpoint, sexually explicit. Looking for Alaska, by John Green. Reasons: Offensive language, sexually explicit, unsuited for age group. Scary Stories (series), by Alvin Schwartz. Reasons: Unsuited for age group, violence. The Glass Castle, by Jeanette Walls. Reasons: Offensive language, sexually explicit. Beloved, by Toni Morrison. Reasons: Sexually explicit, religious viewpoint, violence.