about five and a half... ;)
Around 5 million copies of "Inkheart" have been sold worldwide.
Inkheart, Inkspell and Inkdeath are have now all been released worldwide.
Over 2 million copies of Blue Bayou have been sold worldwide.
Over 40 million copies of "Animal Farm" by George Orwell have been sold worldwide since its publication in 1945.
Approximately 6 million copies of "New Moon" have been sold worldwide since its release.
Over 1 million copies of White Fang have been sold worldwide.
There have been over 55 million copies of the Oxford English Dictionary sold worldwide.
3.6 million worldwide and 879,000 copies in the US
As of now, over 2 million copies of "Exposed" have been sold worldwide.
Both Inkheart (the book) and Inkheart (the film) have been released in America.
Over 1 million copies of Ender's Shadow have been sold worldwide since its publication.
Inkheart the movie has now been released.
It is estimated that over 1 trillion copies of books have been sold worldwide since the invention of the printing press.