Which retail strategy fundamentally transformed the Harry Potter merchandise market and became a blueprint for literary franchise retail experiences?

In the world of arts and literature, retail strategy has evolved dramatically with consumer preferences. Bookstores and literary merchandise sellers have found innovative ways to create immersive experiences and build brand loyalty. This poll tests your knowledge about a specific retail success story that transformed how literature-based merchandise is marketed and sold globally. Can you identify the correct retail innovation that changed the game?

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The creation of dedicated 'Platform 9¾' retail experiences in major train stations worldwide
The 'Book Club Bundle' strategy that packaged novels with themed teas and bookmarks
The 'Literary Passport' program that offered discounts for visiting multiple bookstore chains
The 'Author's Edition' strategy that included handwritten notes in randomly selected merchandise