Dr. Weil has raised dispensing health advice to an art form. Instead of making his audience feel inadequate or guilty about bad habits, he seems to subconsciously convince readers to do better merely by presenting health facts in a non-threatening way. Healthy Aging is his most scientifically technical book yet (you'll learn all about enzymes like telomerase and cell division and the chemistry behind phytonutrients like indole-3-carbinol, and the connection between cancer and other degenerative diseases like diabetes) yet by far his most fascinating. His main mission here is to recommend "aging gracefully," which he considers accepting the process instead of fighting it. As the director of the country's leading integrative-medicine clinic (combining the best of traditional and alternative worlds), of course he disses Botox and the slew of $100-a-jar face creams out there. It's also no surprise that he focuses on proper nutrition, moderate exercise, and meditation and rest among his "12-point program for healthy aging." (Triathletes and exercise addicts should take special note of the research linking excessive exercise and ALS, or amyotrophic lateral sclerosis.) He occasionally references his earlier works, including 8 Weeks to Optimum Health. But the most eye-opening sections are those that discuss the spirituality of aging and its emotional aspects. "Aging can bring frailty and suffering, but it can also bring depth and richness of experience, complexity of being, serenity, wisdom, and its own kind of power and grace," he writes. At 63, Weil is still a bit shy of senior status, but is aging well indeed, with the legacy of his late 93-year-old mother (who's touchingly eulogized by Weil in this book) to guide him.--Erica Jorgensen