I have collection of most of his talks on Ramana (various works like Aksharamana Malai etc), Bhagavatham & Gita. Whatever be the topic, he will revert back to Ramana and his teaching and personal life incidents every few minutes, so much is his devotion to his Guru. As he says, Ramana has opened the greatest secret for salvation - the "Who am I" enquiry method which is the shortest and only method to finally reach the goal. Just listening to his voice is so soothing and his words come from his heart.
I had the good fortune of meeting him at his residence for clearing certain personal doubts. He is most simple, humble & honest like a child with no airs and easily approachable unlike some other guru's and jnani's. He is a living embodiment of Ramana's teaching. He does not believe in creating organizations and gathering followers, only in transferring the great knowledge to sincere seekers. Seems in his childhood he has seen many deaths in his family and started to enquire at a very young age and visited many saints and sages before finally arriving at Ramana Samadhi in Ramanashramam and that was the end of his search. I had once listened to his talks on Ramayana at Ramanashramam itself and found it very hard to withstand the high vibration and energy. He spends a few weeks every now and then in total silence in Ramanashramam, otherwise does not travel much. He is a PhD in Sanskrit from Sree Sankaracharya Sanskrit University, Kalady, the birth place of Sankara.