"Eighty has been the new sixty for about twenty years now. In fact, there have always been late-in-life achievers, those who declined to go into decline just because they were eligible for social security. Journalist, humorist, and history buff Mo Rocca and coauthor Jonathan Greenberg introduce us to the people past and present who peaked when they could have been puttering--breaking out as writers, selling out concert halls, attempting to set land-speed...