"Since the 1997 release of Harry Potter and the Philosopher's Stone (the book was retitled Harry Potter and the Sorceror's Stone when it was released in the US), the series has proven to be one of the most popular in history. It's reported that as of April 2007, the series had sold more than 325 million copies and had been translated into more than 60 different languages. The first five books have been made into blockbuster films, with the sixth set to begin filming later this year."

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