Which marketing campaign strategy propelled J.K. Rowling's 'Harry Potter' series from an initial modest print run to a global phenomenon before the films were released?

Before becoming household names, many publishing houses had to make bold marketing decisions to launch unknown authors into stardom. One particularly innovative campaign in the 1990s completely transformed how books were marketed and created a cultural phenomenon that changed the publishing industry forever. Test your knowledge about this revolutionary marketing approach that blended mystery, anticipation, and community engagement.

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The 'Midnight Magic' release parties that turned book launches into cultural events, creating anticipation and community around each new release
A celebrity endorsement campaign featuring popular children's TV presenters reading excerpts on national television
The 'Golden Ticket' promotion where 50 random books contained tickets to visit the actual Hogwarts film set
An early internet viral campaign where fans could interact with an online Hogwarts and be sorted into houses before reading the books