Books Sans Title

One thing that most of us OSGs are guilty of is having labeled books. That's not how most books were from the time that we're using to base many of our games on. Most books in the medieval period had nothing of real note on their exteriors - covers existed almost solely to protect the books.. So you get shelves that look like the below (an image of Merton College's Medieval Library that's been in use since the late 1300's) wherein the value of a librarian immediately becomes obvious.

They know which books are which. :-)