Grappen over Bibliothecarissen

A man walks into a library and asks for a book on how to deal with rejection without becoming bitter. The librarian looks it up and says, "We have one, but it's out." The man says, "Of course it is." The librarian says, "See? You're handling it beautifully."

I asked the librarian if the library had books on paranoia. She whispered, "They're right behind you."

What building has the most stories? The library.