In this remarkable little volume, Sri Swami Sivananda has, as a skilful doctor, an expert Yogi, an ace psychologist, and a Perfect Sage, laid down several medical, Yogic, Vedantic, psychological, scientific, Ayurvedic and Naturopathic methods for becoming a Centenarian. For all those who are earnestly seeking for perfect health and a very long life, this work will be highly inspiring, informative and valuable.