Index of School Book Bans- PEN AmericaBook bans in public schools have recurred throughout American history, and have long been an issue of concern to PEN America, as a literary and free expression advocacy organization. Over the past nine months, the scope of such censorship has expanded rapidly. In response, PEN America has collated an Index of School Book Bans, offering a snapshot of the trend. The Index documents decisions to ban books in school libraries and classrooms in the United States from July 1, 2021 to March 31, 2022.