Sangam Tamil books are at least 2000-year-old; chronologically Tamil stands next to Sanskrit in India; though 6000 year old Vedas are still available and recited in all the temples and Vedic Schools, Tamils have lost many of their ancient works. But fortunately, we see the continuity of Vedic thoughts in Tamil Sangam books; they are 18 in number. There is another grammatical treatise Tolkappiam which is considered older than the 18 books. We see full-fledged Hinduism in it. The book mentioned Vedic Gods as the Gods of the Tamils. I have been writing about it from 2011. This book has some of the articles on this topic.