Which innovative marketing technique first launched J.K. Rowling's 'Harry Potter and the Philosopher's Stone' to massive success in the UK publishing industry?

The publishing industry has evolved dramatically in how books are marketed and sold to readers. From traditional bookstore displays to innovative digital campaigns, publishers have employed various techniques to capture reader attention. This trivia question explores a groundbreaking marketing approach that changed how we discover and engage with literature. Test your knowledge about a revolutionary marketing strategy that transformed book promotion!

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Midnight release parties with themed costumes and activities
Splitting the book into two distinct editions - one for children with colorful covers and one for adults with sophisticated designs
An augmented reality smartphone app that brought characters to life when pointed at the book cover
A nationwide treasure hunt where clues in bookstores led to signed copies and prizes