Now in paperback, the latest book in the New York Times bestselling, one-million-copy-plus Younger Next Year franchise. The book that tells every reader how to lose weight, discover new vitality, and get in the best shape of your life. The book with the no-nonsense, no-BS, no-shortcuts approach. The book that shows that there's a revolution in aging going on. The book that is the how-to of that revolution.

Chris Crowley, the memorable patient and coauthor of Younger Next Year, partners with Jen Sacheck, a nutritionist and fitness expert from Tufts University, and...