Which book series pioneered the use of interactive websites, online puzzles, and social media 'houses' as part of its marketing campaign, creating unprecedented reader engagement in the early 2010s?

In the literary world, marketing campaigns can transform a book from an unknown manuscript to a global phenomenon. Publishers and authors have developed increasingly sophisticated strategies to build anticipation and create cultural moments around new releases. This trivia question explores one of the most innovative marketing approaches in contemporary publishing history that changed how books are promoted and consumed in the digital age.

This is a live public trivia poll on AIPolls.Net. Vote and see real-time results.

The Hunger Games trilogy by Suzanne Collins
Harry Potter series by J.K. Rowling
Twilight saga by Stephenie Meyer
A Song of Ice and Fire series by George R.R. Martin