It's like a plot from a Hollywood potboiler: start out in the mailroom, end up a mogul. But for many, it happens to be true. Some of the biggest names in entertainment--including David Geffen, Barry Diller, and Michael Ovitz-- started their dazzling careers in the lowly mailroom. Based on more than two hundred interviews, David Rensin unfolds the never-before-told history of an American institution--in the voices of the people who lived it. Through...