Aging is not a process of decline; it is a process of continuing to meet life's challenges and of growing into a complete human being. Aging is a complex interaction of genetics, chemistry, biology and physiology; topics that are worthwhile to address. This book offers a good introduction to the biology and chemistry of aging. It emphasizes on cellular aging, and covers different areas and theories which deal with mechanism of aging. If the reader has some background in biology, then this is an excellent introductionary book to the biology and chemistry of aging. The book includes information on aging of cell and reversal of aging, DNA damage theory of aging, acidity, oxidative stress, radicals, insulin/IGF hormones, anabolic and catabolic hormones, testosterone and estrogen, energy through conversion between NAD+ and NADH, DNA transcription to RNA, and RNA translation to protein. This book is the first of its kind in providing scientists, physicians, pharmacists, engineers, teachers, computer programmers, and anyone with a background or strong interest in biology, chemistry, and aging. The book deals with scientific causes of aging, and philosophical and sociological implication of life-extension and research on aging. I recommend it for those serious about the biology and chemistry of aging.