This list has been compiled by the American Library Association’s Office for Intellectual Freedom (OIF). The OIF estimates that "82 - 97%" of challenges remain unreported. OIF compiled this list of the most banned and challenged books from 2010-2019 by reviewing both the public and confidential censorship reports it received. Additional information about Challenge Reporting is provided by the American Library Association.
"Top 100 Most Banned and Challenged Books: 2010-2019", American Library Association, September 9, 2020. http://www.ala.org/advocacy/bbooks/frequentlychallengedbooks/decade2019 (Accessed August 30, 2022) Document ID: ed7826dc-f0a5-4e0b-80cc-5d2d0d448986