Which marketing innovation did Bloomsbury Publishing first use for the adult editions of J.K. Rowling's Harry Potter books that has since become standard practice in the publishing industry?

The publishing industry has seen revolutionary marketing campaigns that transformed books into cultural phenomena. Behind many bestsellers are ingenious marketing strategies that helped unknown authors become household names. This trivia tests your knowledge about one of the most influential marketing campaigns in literary history that changed how books reach audiences and created new promotional paradigms in the publishing world.

This is a live public trivia poll on AIPolls.Net. Vote and see real-time results.

Dual cover designs (adult and children's versions) for the same book
Pre-release midnight bookstore launch parties
Author video blogs documenting the writing process
Subscription box exclusives with special edition covers