When my first book, The Heroic Enterprise, was published by Simon & Schuster in 1996, I asked about releasing it on audio. “Let’s see how it goes,” my editor replied, warning me that while there was an audiobook market by then — primarily in the form of cassette tapes — it wasn’t very large. If my book on corporate social responsibility turned out to be a bestseller, there might be enough demand to justify a cassette version.