How much money have they got when they sold the Harry Potter books?

J.K. Rowling's Harry Potter book series has generated billions in revenue, with estimates suggesting that she earned over $1 billion from book sales alone. The series, which includes seven books, has sold over 500 million copies worldwide, making it one of the best-selling book series in history. Additionally, revenues from related merchandise, film adaptations, and theme parks have significantly increased her overall earnings.