Why Banning a Book Makes It Popular

The second step does most of the work. The announcement of a ban is free advertising that makes the news. For most banned books, the overwhelming majority of people learn about them through the announcement of the ban.

The third step is explained by our reaction to restrictions on freedom. When your choice is taken away, the thing you can no longer choose becomes more attractive. This pattern has been described and tested across all kinds of things, from books to store merchandise.

The second tile matters for an honest picture. The spike is usually brief: interest fades after a few weeks. In the long term, a ban does restrict access, especially when it is reinforced by removing books from libraries and schools.

A church index of banned books, maintained for several centuries, worked in much the same way: being included often made an author famous. Publishers in other countries printed such books specifically because they knew there was demand.

The same mechanism has also been described in recent history under the name of an effect that arose from an attempt to remove a single photograph from the internet: the lawsuit drew vastly more attention to it than the original post itself.

There are also reverse examples, which are discussed less often. Quiet removal without an announcement works more effectively than a loud ban: the book simply disappears from sale and from the school curriculum, and no spike occurs.

That is why censorship researchers see a noisy ban as a sign of weakness, not strength: it shows that removing the content quietly did not work.

This works with more than just books. Attempts to delete a post, classify a document, or force a story to be taken down regularly lead to tens of times more people learning about it than would have read it in the first place.