" Ivan Lankowski,” said Petra. “The name I’d like to hear is the name of the one who sent you.” “One’s superior officer is never named. It is a basic rule of security.” Petra sighed. “I suppose this proves I’m not in Kansas anymore.” “I don’t believe,” said Lankowski, “that you have ever been in Kansas, Mrs. Delphiki.” “It was a reference to—” “I have seen The Wizard of Oz,” said Lankowski. “I am, after all, an educated man. And…I have been in Kansas. "
― Orson Scott Card , Shadow Puppets (The Shadow Series, #3)