How many copies do you think the Harry Potter series has sold, total? How many copies of The DaVinci Code do you think have been sold? 

I took a look at the world’s best-selling books and book series of all time, according to Wikipedia’s list, which they admit is “an incomplete list that may never be able to satisfy particular standards for completeness.” To be fair, I’m pretty sure that no list of best-selling books can be complete, ever.

Before we get going… which do you think is the best-selling book of all time? (The Bible and The Koran don’t count since, well, we’ll never know). I think the answer will surprise you. It certainly surprised me.

Here they are, the best-selling books of all time, according to Wikipedia. (Numbers are in millions of copies sold)