As part of our lesson in Greek today, we met at the library for our instructor to show us where to find our necessary sections. I found the conduct inside the library rather interesting. Everywhere we went, our professor would pick up books to show us, then set them down on a table two feet away, then continue on. He would even pass around books and tell us to find a table to put them on when we were done. When questioned about this, he informed us that it's proper library etiquette to refrain from reshelving books, as you're most likely going to do it wrong. I guess it makes sense, but it was still a little weird.
An hour later, we went back to the library with my Latin class (same professor). It was essentially the same tour, so someone conveniently picked out all the books we needed to see and laid them on tables near their respective shelves.