Which literary franchise became the first book series to generate over $1 billion in merchandise sales separate from book and movie revenues?

The book publishing industry has seen numerous marketing innovations over the decades, transforming how literature is marketed and consumed. From branded merchandise to innovative retail strategies, publishers have found creative ways to extend the reach of their literary properties. This trivia question explores one of the most financially successful merchandising campaigns tied to a literary franchise in history.

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

Harry Potter
The Lord of the Rings
The Hunger Games
Twilight