| What... | | Did you know? |
| was the largest library of the ancient world? | |
| was the most banned book series in America from 2000-2009? | |
| was the first published book written on a typewriter? | |
| is the fifth most-sold single-volume book? | |
| is the fourth most-sold single-volume book? | |
| is the third most-sold single-volume book? | |
| is the second most-sold single-volume book? | |
| is the most-sold single-volume book? | |
| is the most expensive book ever sold? | |
| They're older than the answer, but the Ebla tablets were in an archive, not a library! | |