The series has so far sold more than ten million books in 39 countries.

The full series has sold just over 44 million albums.

The series has sold over 342,000 units within its first week.

The series has sold three million copies in 16 countries around the world.

As of March 2011, the series has sold over 9.9 million units.

As of March 2012, the series has sold over 13 million copies.

So far, the series has sold over a million copies.

The series has sold over 75 million books in 40 countries.

The series had sold in 2008 a total of 7,949 copies.

As of 2013, the series has sold 8 million copies in 35 countries.