Which innovative product launch strategy first popularized by Bloomsbury Publishing for the Harry Potter series is now widely used in the publishing industry?

In the competitive world of publishing, a book launch can make or break a new release. Publishers and authors carefully craft product launch strategies to maximize visibility, sales, and reader engagement. This trivia question explores a famous publishing innovation that revolutionized book launches and created a global phenomenon. Test your knowledge about how literary works transform from manuscripts to cultural events!

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Midnight release parties with themed costumes and activities
Simultaneous international digital and print release
Author-narrated audiobook bundled with hardcover purchase
Limited edition collector's covers with embedded digital content