I like to listen to audio books when I walk. And since I can check them out for free at the library, I take full advantage of the service. But, I have noticed that every audio book on the shelf is a “New York Times best selling author.” Now, that doesn’t mean that the book is a New York Times best selling book. It only means that the author has sold a lot of books. And given the fact that all of the audio books have received this designation makes me wonder what it takes to receive it?