Kriya Yoga The Science of Life Force. Kriya yoga is said to be a modern revival of ancient yogic practices initiated by mahavatar babajik. riya yoga is composed of several levels of pranayamas that are intended to accelerate spiritual development and assist in the attainment of high levels of self-awareness, tranquillity, and communion with God. This style of yoga is heavily reliant on the breath. kriya yoga is the science of the vital force. explains what kriya yoga is and goes into detail about the various kriya yoga techniques. This book discusses prana vidya or the study of life force. The sarira tattva, or body principle, is also extensively discussed in this enlightening book. Kriya yoga: the science of life force is a comprehensive guide for anyone interested in this style of spiritual practice. It was published in hardcover by Munshiram Manoharlal Publishers in 2014.