film adaptations Warner Bros. Pictures all of which have been highly successful in their own right Philosopher's Stone Harry Potter and the Philosopher's Stone Harry Potter
The popularity of the Harry Potter series has translated into substantial financial success for Rowling, her publishers, and other Harry Potter related license holders. This success has made Rowling the first and thus far only billionaire author. The books have sold more than 600 million copies worldwide and have also given rise to the popular film adaptations produced by Warner Bros. Pictures, all of which have been highly successful in their own right. The total revenue from the book sales is estimated, as of November 2018, to be around $7.7 billion. The first novel in the series, Harry Potter and the Philosopher's Stone, has sold in excess of 120 million copies, making it one of the bestselling books in history. The films have in turn spawned eight video games and have led to the licensing of more than 400 additional Harry Potter products. The Harry Potter brand has been estimated to be worth as much as $25 billion.
