S. P. Ramalingam Pillai
(ஞானகங்கை) is a seminal Tamil spiritual and philosophical work that compiles the profound thoughts and teachings of Sri Guruji M.S. Golwalkar , the second Sarsanghchalak of the Rashtriya Swayamsevak Sangh (RSS). The book serves as a "lighthouse" for those seeking clarity in times of confusion, offering a deep dive into nationalistic pride, spiritual wisdom, and the path toward social and cultural rejuvenation. Overview of the Book gnana gangai book
If you are referring to the widely distributed spiritual book that is translated into multiple languages (including Tamil as Gnana Gangai ), this is authored by Jagatguru Tatvadarshi Sant Rampal Ji Maharaj gnana gangai book