Which literary product launch set a record by selling over 8.3 million copies in its first 24 hours, demonstrating unprecedented retail demand and transforming book release strategies?

The publishing industry has seen some remarkable product launches that transformed literature and reading culture. From groundbreaking book formats to revolutionary distribution models, the business of bringing stories to readers has evolved dramatically. This trivia tests your knowledge about notable product launches that changed the literary landscape and how readers consume books. Can you identify the revolutionary product that transformed the publishing industry?

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J.K. Rowling's 'Harry Potter and the Deathly Hallows' (2007)
Dan Brown's 'The Da Vinci Code' (2003)
Amazon's original Kindle e-reader (2007)
Stephen King's 'Riding the Bullet' (first major e-book, 2000)