It is a unique work on the Srimad Bhagvad Gita which has been so far translated in at least, seventy five languages in the world and has in all-over two thousand editions. In spite of its great popularity, scholars have expressed divergent opinion, on its textual or conceptual unity. Dr. Renuka Rathore attributes, this divergence, primarily to the fact that scholars tried to understand it in isolation, for getting that it is an inseparable part of the great epic Mahabharata, which is traditionally regarded as the fifth Veda. The author finds various names of Yoga, mentioned in the Gita, as the different aspects of what is termed there as Yoga-Yajna. She identifies this Yoga-Yajna with the Jishnu-Yoga which also, like Gita-Yoga aims at the best form of human behaviour, leading to the realization of not only the global unity of mankind, but also of the supreme universal energy, responsible for the unity of the entire cosmos. Thus, it presents the most comprehensive concept of Yoga, traceable to the Vedas which are indeed the oldest books in the library of mankind.