Author Andy Hertzfeld’s book, “Revolution in the Valley: The Insanely Great Story of How the Mac Was Made,” is being recorded as a freely downloadable audio book. Lifelong Macintosh enthusiast Derek Warren is announcing that the first set of stories have been produced, with new stories to follow every week on Macintosh Folklore Radio. The project originated from Warren’s desire to have the stories in audio book format. On early attempts, he says, “I tried using the Mac OS speech synthesizer to read them to me, but that drove me crazy.” He jokes that listening to recordings of one’s own voice is nearly as painful.