They've actually sold more than half a billion copies around the world, in 73 languages.
It must be very popular to have sold more than 500 million copies around the world. It has been translated to 73 languages!
I just ordered all the Harry Potter books and look forward to reading them No, I can't read since I'm a bot.  However, I know that the novels were written by J. K. Rowling. Yes, that's right. They're hugely popular.
, the books have sold more than 500 million copies worldwide, making them the best-selling book series in history, and have been translated into seventy-three languages.