Brig Rawel Singh (born 1932), the author of this book retired from the Indian Army over thirty two years back. He has since then devoted himself to study and dissemination of the guru's message. He has a number of articles on Sikh faith and comparative religion. He runs popular blog called sadhsangat.com. His interests include English translation and exegesis of Sri Guru Granth Sahib along with the comparative study of the Old Testament, New Testament, the Qur’an, and Hindu texts. His blog is intended to engage in a dialogue with wider audience mostly on theological issues. The blog also contains complete interpretation of Sri Guru Granth Sahib.
