Banned Index
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Challenger Groups

Organizations that publish lists of books they oppose. Banned Index tracks these as a separate signal from confirmed bans.

Flagging is not the same as a ban.

Books appearing on a challenger group’s list have been publicly targeted, but they may never be removed from any specific library. The opposite is also true — many books that have been banned in school districts were not on any challenger group’s public list. These lists are useful as a predictivesignal of what’s likely to be challenged next, and as context for understanding the broader ecosystem of book-challenge activism. They are never rolled into ban counts. Read our methodology for the full distinction.