Which digital marketing innovation first allowed an author's book to reach #1 on the New York Times Best Seller list without ever being published by a traditional publishing house?

The publishing industry has undergone tremendous digital transformation in recent years. From e-books to online marketing strategies, publishers and authors have had to adapt to new digital realities. This trivia question explores a fascinating digital marketing milestone that revolutionized how authors connect with their audience and promote their literary works. Test your knowledge of the intersection between digital marketing innovations and the world of literature!

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Facebook advertising campaigns launched by Amanda Hocking in 2010
Amazon Kindle Direct Publishing platform launched in 2007
Hugh Howey's serialized self-publishing strategy for 'Wool' in 2011
E.L. James's Twilight fan fiction marketing that became 'Fifty Shades of Grey' in 2011