The author of India's Ancient Past, R. S. Sharma, was an eminent historian, who taught at Patna University, University of Toronto and Delhi University as well. He was able to publish 115 books, throughout his life, which were translated into fifteen languages. He was the Head of Departments of History at Delhi and Patna Universities and was also the Chairman of the Indian Council of Historical Research. He was considered to be a master of epigraphy, literary texts and archaeological texts, which made his writing interesting and enlightening.