Well, it's Sunday - a great day to curl up with a book.
And if you're looking for a recommendation on what to read based on popular sales, the graphic above may be able to help.
It breaks down the top-selling books of the last 50 years.
The Holy Bible comes out on top, with 'Quotations from Chairman Mao Tse-Tung' way back in second place (although 820 million copies is still a pretty impressive sales figure).
And in third place - once the "required reading" is out of the way - is a certain boy wizard. Nice one, Harry.
While it's a thought-provoking chart (who knew 'Think And Grow Rich' was such a big deal?), it's not clear what Chapman's methodology was. He just says he completed "a long project of research to establish exactly which are the most read books in the world."
Figuring out exact sales is tough though, since there's no single, central repository of information about total sales numbers. So any list like this is probably partly based on speculation.
Still, this it's never a bad idea to grab the first book of the Lord of the Rings trilogy and nerd out on a Sunday afternoon. 103 million people thought it was a good idea.