How many copies of the Harry Potter books were sold around the world?

400 million copies

The Harry Potter book series sold more than 400 million copies around the world, including those books related to the series – Fantastic Beasts and Where to Find Them, Quidditch Through the Ages and Tales of Beedle the Bard. The seventh book, Harry Potter and the Deathly Hallows, sold approximately 44 million copies in 2007.