Having sold more than 500 million copies worldwide,[6][7][8] Harry Potter by J. K. Rowling is the best-selling book series in history. The first novel in the series, Harry Potter and the Philosopher's Stone, has sold in excess of 120 million copies,[9] making it one of the best-selling books of all time. As of June 2017, the series has been translated into 80 languages,[10] placing Harry Potter among history's most translated literary works.