J. Rowling

"Professor Dumbledore seems to have been writing for a Wizarding audience, so I have occasionally inserted an explanation of a term or fact that might need clarification for Muggle readers."

- J. K. Rowling, The Tales of Beedle the Bard

J. K. Rowling was a Muggle author. Despite being a Muggle, she had a connection to the wizarding world for an unknown reason, and was an acquaintance of Albus Dumbledore.

J. K. Rowling authored Wizards' Book and the 2008 edition of The Tales of Beedle the Bard. Along with Comic Relief, she set up a fund in Harry Potter's name for proceeds from the sales of special copies of Fantastic Beasts and Where to Find Them and Quidditch Through the Ages to be used to help struggling children worldwide. She would later associate with another charity, the Children's High Level Group, to distribute royalties from the sale of The Tales of Beedle the Bard.

Rowling was also apparently associated with the Wizarding Examinations Authority, as her signature appeared on completion certificates for the Wizards' Ordinary Magic and Basic Aptitude Test.

"J.K. Rowling is a world authority on Quidditch and has been writing about the sport since 1990. Royston Idlewild, former player and International Director of the ICWQC, described her as ‘perhaps the only person in the world who knows more about Quidditch than I do.’"

- Description

In addition to this, Rowling had access to a computer on which she frequently used the internet. She was the Quidditch correspondent for Pottermore.com, and provided information for them on the Quidditch World Cup to share with Muggles; in addition to this, she gave insight into Muggle sports from a wizarding persective as well.

Behind the scenes

 * As this individual is the in-universe counterpart of J. K. Rowling, it is likely she also authored the in-universe counterpart of the Harry Potter series.

Appearances

 * Fantastic Beasts and Where to Find Them
 * Quidditch Through the Ages
 * The Tales of Beedle the Bard
 * J.K. Rowling's Official Site