• The 100 Most Frequently Challenged Books by Decade (American Library Association)
• A Chronicle of Freedom of Expression (in Canada, 2001)
• EFF “Censorship – Canada” Archive 2003
• Forbidden Library: Banned and Challenged Books (Janet Yanosko)
• Free Expression in Canada (PEN)
• Free Expression Network Clearinghouse 2003
• Freedom of Expression Spotlight International Freedom of Expression eXchange (IFEX)
• Freedom to Read.ca
• The File Room
• Index Librorum Prohibitorum [Index of Prohibited Books]
• The Most Frequently Banned Books in the 1990s (Carnegie Mellon)