Which innovative product launch strategy did Bloomsbury Publishing use for the final Harry Potter book that revolutionized book release events?

Product launches in the publishing world can be just as strategic and high-stakes as those in tech or retail. Major book releases often involve careful timing, marketing campaigns, and distribution strategies that can make or break a literary work's success. Test your knowledge about some of the most innovative and notable book launch strategies that transformed both the publishing industry and literary culture!

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Midnight release parties with themed costumes and activities, creating a cultural event around the book's availability
Releasing the book simultaneously as an audiobook narrated by the author, creating dual-market appeal
Publishing the first three chapters free online one month before release, using digital sampling to drive physical sales
Selling limited-edition copies with unique cover art in art galleries before the main release