THIRUVANANTHAPURAM: Chattambi Swamikal’s greatest contribution to society in general and Hinduism in particular was his bold decision to challenge the ‘rule ‘that only brahmins were entitled to learn Vedas. By authoring several books on Advaita philosophy, at a time when it was inaccessible to non-Brahmins, he opened up new vistas to vedantic philosophy to even those who had no knowledge of Sanskrit. Bharateeya Vichara Kendram director P Parameswaran will release the book by handing over a copy to scholar Panmana Ramachandran Nair at a function to be held at Thiruvananthapuram Press club on Saturday. N P Unni, former Vice chancellor, Sanskrit University, Kalady, will preside over the function. Swami Prajnananada Theertha Padar will deliver the keynote address. The Centre for South Indian Studies has requested those who are in possession of literature relevant for inclusion in the archive to hand over the same for digitisation.