Which of these innovative book marketing campaigns actually happened and helped create a bestseller?

The publishing world has created some of the most memorable marketing campaigns in retail history. From clever taglines to innovative launch strategies, publishers have found unique ways to turn books into cultural phenomena. Test your knowledge of the marketing brilliance behind some of the biggest literary successes of our time. Can you identify which campaign strategies actually happened versus those that sound plausible but never occurred?

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

The 'Decode Fibonacci' online puzzle for Dan Brown's 'The Da Vinci Code' that rewarded solvers with access to the first chapter before official release
The 'Midnight Magic' parties for the Harry Potter series where bookstores opened at exactly 11:59 PM for eager fans wearing literary costumes
The 'Read It Before They Ban It' campaign for Salman Rushdie's 'The Satanic Verses' orchestrated by the publisher after religious controversy
The 'Find Holden Caulfield' social media scavenger hunt for the 50th anniversary edition of 'The Catcher in the Rye'