Which marketing campaign strategy led to J.K. Rowling's 'The Casual Vacancy' breaking the record for fastest-selling hardback fiction title in the UK upon its 2012 release?

The publishing industry has seen numerous innovative marketing campaigns that transformed books into cultural phenomena. From midnight release parties to cross-media promotions, publishers have developed increasingly creative strategies to launch new titles. This trivia question explores one of the most successful book marketing campaigns in recent history that redefined how literary works are promoted in the digital age.

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A complete media blackout with no advance copies, creating mystery and anticipation
An interactive augmented reality experience allowing readers to 'unlock' chapters in various locations
A subscription model where fans received monthly installments of the book before publication
A social media campaign where influencers received personalized chapters to share with followers