Sri Bagavath Iyya, from the --- tradition, is a native of --- and has spent his time as Sadhak (Spiritual Seeker) and reached the first peak of enlightenment some --- years ago. His books are available freely here in both English and Tamil.
Here, at YM, one of his students is compiling resources and is just beginning her journey as an Acharya (Teacher).
And the official resources
Introduction videos from a Sadhak (Nirupama)
Videos in Tamil
Text to Speech