This book is based on personal experience of the writer after he recovered from stroke attack. Seven years back writer had stroke attack in India and he came to USA for treatment. For two years he was treated by several doctors all of them said that he will have to take medicines till the end of his life. Writer hated taking medicines because they all had side effects more than the relief . Writer was practicing yoga from his very childhood but left practicing when he went to study in college. He started following yoga and started studying medical science too comparing both. He started studying lives of ancient Indian Yogis who had attained immortality practicing yoga. Writer found a book written by an ancient yogi named Acharya Patanjali written 5000 years back named HATH YOGA PRADIPIKA and tried to follow it because it was based on the personal interview and discussions with some of the immortal yogis present at that time. My book also has an English version of the book HATH YOGA PRADIPIKA. This is an amazing book on yoga and was the first time disclosure of several immortal yogis on human yogic science. I was so amazed that I started practicing it and also researching its contents comparing with recent medical and other human sciences researches. Surprisingly I found each and every statement of the yogis to be true. All of my ailments after stroke were steadily cured and I also found that my aging was stopped in six years of practice. Study of medical science gave me more and more confidence when I saw that yogis in those days knew about the cellular transformation and their differentiation. I was very much surprised to learn that what doctors and researchers are finding now after spending a lot of money and time, yogis did it from their very personal experience, moving verbally their experiences from one to another those days. I started studying senescence and found that Dr, Carrol was awarded NOBEL PRIZE for keeping chicken heart cells alive for 20 years and also said that this can be true with human too in case they follow the same path what he did in the case of the chicken heart. Cleaning the liquid in side the body, supply oxygen and protein to cells and give cells calm atmosphere to develop and transform. Although it was not based on yoga, because he never said that he read yogic processes, yogic processes are the same . Read the book about other researchers too what they say about senesces . Writer in this book and through this book has tried to convince the world that humans can also attain physical immortality. The most important thing about this book is that writer has tried his level best to explain to people that any and all diseases can be cured by yogic processes which is free and without any cost. Everyday new disease develop and researchers are busy finding reason and their cure in which they have never succeeded. Problem is how to stop these virus diseases catching human, there is only one way and that is by practicing yoga. Yoga does not cure diseases rather it helps people from attacking other viruses. It acts like an umbrella for human against diseases. Also yoga or yogic process is good for, young, adult, old, diseased, men and women all. Curing diseases all the way naturally is the greatest challenge of 21st century which yoga achieved thousands of years back. We just have to let every body about the truth and once this message spreads out, human can not be afraid of any disease in future. Writer s aim is to spread this message of disease cure and immortality to almost one billion people of this world and also the messages about practicing and how to practice. I would like all people to join me in this noble cause, first time in the world. So, my dear readers, don't only read and enjoy yourself, spread this message to all of your family and friends and to all those whom you know can practice yoga. Lastly, yoga is to practice and experience yourself. May GOD grant you immortality