Narayan Shastri and Jagannath Shastri are the co-authors of व्रात्यताप्रायश्र्चित्तनिर्णय: (Decision of Vrata Atonement), an old and rare book published by the Chowkhamba Sanskrit Series Office. The work addresses matters of atonement related to 'vrata' or vows, reflecting traditional Indian knowledge systems.