Which bestselling book series pioneered the use of interactive website puzzles and online scavenger hunts as part of its pre-release marketing strategy, creating a new model for literary engagement?

The publishing industry has evolved dramatically in the digital age, with innovative marketing strategies reshaping how books reach readers. Publishers and authors now leverage sophisticated branding techniques to stand out in an increasingly crowded marketplace. This trivia question explores a groundbreaking digital marketing strategy that revolutionized book promotion and created unprecedented pre-release excitement in the literary world.

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The Hunger Games trilogy by Suzanne Collins
The Da Vinci Code by Dan Brown
Harry Potter series by J.K. Rowling
Twilight saga by Stephenie Meyer