In the book titled ‘The Hidden Oracle of India: The Mystery of India’s Naadi Palm Leaf Readers,’ the authors, Andrew and Angela Donovan, narrates their first time encounter and experience with the Naadi palm leaf readers of Tamil Nadu. Naadi palm leaf readers is said to accurately read the details of the lives of people which has been written down on palm leaves thousands of years ago. It is also referred as the Naadi Astrology.

The popular belief is that the Naadi palm leaf containing past, present and future of living beings were compiled by Sages like Agastya, Bhrugu, Vasishta, Shukra and other saints. What is interesting in this form of astrology is that a compilation contains future of all human beings born or yet to be born.