 Have you ever read a story and thought, hmm, that doesn't sound right? One of the things that fiction writers are constantly trying to do is to put the reader in a dream. And the alarm clock is the subconscious mind of the reader saying, that doesn't sound right. You're going to be like, you know what, this dream is stupid. I'm leaving. I'm Mary Childs, and today on Planet Money, how three novelists injected economic reality into their fiction.