How much copies did the last Harry Potter book make?

The last Harry Potter book, "Harry Potter and the Deathly Hallows", sold an incredible 12 million copies in the first 24 hours of its release in the United States and the United Kingdom.

It's impossible to determine the exact number of copies made globally, as that information is not readily available. However, it's safe to say that the book has sold hundreds of millions of copies worldwide.