What's IT all about | What is the Bible?

According to the all knowing Google and Guinness World records, around 7 billion Bibles have been sold.

This is about 6 billion more than the next book. Surely, this can't be a reliable statistic and someone messed with the numbers? The Bible couldn't have outsold all other books, in the past and currently, by such a huge margin? Unless it is what it claims to be - the Word of God. Whoa!