Illustration: Jared Fanning
I had an inclination that The Bible would be number one, but I had no idea by how much. I think it is a little skewed because of the chosen statistics. For one, it is over the last 50 years - which is a long span of time. The first Harry Potter book wasn't published until 1997. The Da Vinci Code was published in 2003. I will not bother to look up Twilight. Ew, Twilight. Also this is based on books sold, I am sure The Bible does a whole lot of selling to churches and what not.
I would love to see this with just the last 10-12 years. I am not sure what other metric could be used besides sales but it would be worth looking into.
-Via Bits and Pieces
The Quran should be at at least #2, if not #1.
As CamilleR says, I'm also not sure that an entry for 'Harry Potter' counts as 'a book', rather it's a series of books, as is LOTR, Twilight, etc.
Give it 10 more years and '50 Shades of Grey' will have edged out Anne Frank, mark my words. All hope it lost!
I agree with previous posts on that books within series should be split up.