Most people know they should eat better, exercise more, and sleep longer. Very few understand why those choices matter at the biological level—or how to build a system that actually works across decades. The Living Years is a rigorous, humane guide to the science and practice of aging well, written for the intelligent adult who wants to close the gap between how long they live and how fully they live. Adriano Solera opens with a deceptively simple observation: life expectancy has more than doubled since 1800, but healthy life expectancy has not kept pace. Drawing on evidence from cardiology, metabolic medicine, neuroscience, oncology, sleep research, and exercise physiology, Solera identifies the four dominant threats to late-life health and shows how they are deeply interconnected.