The website “The Hollywood Reporter” published on September 28th 2016 a list with the 25 Most Powerful Authors 2016.
On the top of this list is our dear [J.K. Rowling]. The website writes:
Even without the Harry Potter series and its blockbuster film run, Rowling would make the cut: a TV miniseries based on her first adult book (The Casual Vacancy), an upcoming BBC series based on her Cormoran Strike novels (published under the Robert Galbraith pen name) and a hit West End play (Harry Potter and the Cursed Child), the script of which became the best-selling book of the year so far. The Nov. 18 film Fantastic Beasts and Where to Find Them, set in the Potter-verse but without Harry, brings the biggest test yet for Rowling, 51, who penned the screenplay (her first) for Warner Bros.
The list takes differents factors into consideration, like: book sales, number of adaptations, projects in development, additional credits and cultural influence. In 2nd place on the list is Stephen King and the author from Games of Thrones, George R. R. Martin, shows in 4th place.