Synopsis This book "Indus Script on Its Way of Decipherment" is the result from an interest which the author developed in Harappan Archaeology since last 17 years during his stay at Institute of Archaeology London and later on in National Museum New Delhi where he is holding charge of Harappan material since the last 15 years. It was concluded Proto Dravidian and earliest Aryan were present in Harappan population. The author concluded Harappan script sign. This book is in a very simple English language which will be very useful for student and public. The author contradicted pre conceived idea of only Dravidian language theory of Harappan. He prefers this earliest civilization of South Asia region. A unique contribution of the author is identification of Inscribed double headed Siva from Kalibangan. Which has three sign in proto Brahmi sript and author read these three sign as Shivam.