" Now you may have gotten the impression that there are absolutely no uses for Librarians. I'm sorry if I implied that. Librarians are very useful. For instance, they are useful if you are fishing for sharks and need some bait. They're also useful for throwing out windows to test the effects of concrete impact on horn-rimmed glasses. If you have enough Librarians, you can build bridges out of them. (Just like witches.)
And, unfortunately, they are also useful for organizing things. "

― Brandon Sanderson , Alcatraz Versus the Knights of Crystallia (Alcatraz, #3)