Peter Kelder's The Ancient Secret of the Fountain of Youth introduces the Five Tibetan Rites, a series of five yoga-like exercises designed to rejuvenate the body and improve overall wellness. The book, which originated from a 1939 text, tells the story of a British army officer who learns these exercises in a Himalayan monastery to boost energy, promote longevity, and balance the body's seven energy centers, or chakras.
You can purchase the original book on Amazon or find it through Penguin Random House . Ancient Secret of the Fountain of Youth - Amazon.com Ancient Secret of the Fountain of Youth