“On November 5, 1522, Luther’s books had been banned from sale in Nürnberg. On November 7, Duke George had prohibited the sale and purchase of Luther’s German translation of the New Testament in ducal Saxony” – Luther’s Works (ed. Christopher Boyd Brown; vol. 59; Saint Louis, MO: Concordia Publishing House, 2012).
When books are banned they become even more desirable. Banning a book is like banning teen handholding. You’re just urging it on.