Step 1: Identify the authors and their famous works.
J.K. Rowling: Author of the "Harry Potter" series.
Suzanne Collins: Author of "The Hunger Games" series.
Veronica Roth: Author of the "Divergent" series.
George R.R. Martin: Author of the "A Song of Ice and Fire" series (adapted as "Game of Thrones").
All are incredibly successful authors.
Step 2: Evaluate the scale of success.
While all these authors have achieved massive success, the "Harry Potter" franchise created by J.K. Rowling is on an unparalleled scale. The success comes not just from book sales, but from a vast commercial empire including:
A blockbuster film series.
Theme park attractions ("The Wizarding World of Harry Potter").
A successful stage play ("Harry Potter and the Cursed Child").
Merchandise, video games, and spin-off media.
Step 3: Conclude based on financial success.
This multi-faceted commercial success has generated revenue far exceeding that of the other authors' works. As a result, J.K. Rowling became the first author to achieve billionaire status from writing and is consistently cited as the world's richest author.