By day, they're authors. Really famous authors. But once a year they shed their pen-and-pencil clutching personas and become rock stars, complete with roadies, groupies and a wicked cool tour bus.   Featuring:  Dave Barry, Mitch Albom, Amy Tan, Scott Turow, James McBride, Greg Iles, Ridley Pearson, Roy Blount Jr., Kathi Kamen Goldmark & Special Guests