1917 Purushottam Nagesh Oak - 1854books/the1854project GitHub Wiki
- Oak, P. N. Some Blunders of Indian Historical Research. Hindi Sahitya Sadan, 1966.
- ---. The Taj Mahal Is a Temple Palace. Hindu World Publications, 1968.
- ---. Who Says Akbar Was Great? Hindi Sahitya Sadan, 1969.
- ---. World Vedic Heritage: A History of Histories. Hindi Sahitya Sadan, 1984.
- ---. Christianity Is Chrisn-nity. Hindi Sahitya Sadan, 1987.
- ---. Islamic Havoc in Indian History. Hindi Sahitya Sadan, 1996.