“By law and tradition, the great library at Unseen University is open to the public, although they aren't allowed as far as the magical shelves. They don't realize this, however, since the rules of time and space are twisted inside the library, and so hundreds of miles of shelving can be concealed inside a space roughly the thickness of paint. People flock in, nevertheless, in search of answers to those questions only librarians are considered able to answer, such as "Is this the laundry" "How do you spell surreptitious?" and on a regular basis "Do you have a book I remember reading once? It has a red cover and it turned out they were twins.”