Macintosh co-creator Andy Hertzfeld will be on the show floor at Macworld Expo signing copies of his book, “Revolution in the Valley: The Insanely Great Story of How the Mac was Made,” reports CNET “Steve Jobs will be the star attraction when the Macworld Conference and Expo opens to the public Tuesday, but many Mac fans might be just as interested in hearing from one of the Mac’s original creators,” notes the story.