CWSA vol. 35 contains letters in which Sri Aurobindo referred to his life and works, his sadhana or practice of yoga, and the sadhana of members of his ashram.
A talk by Dr Alok Pandey.
Writings of Sri Aurobindo. This is a summary of CWSA 33.
This talk is based on CWSA Vol 31 Transformation of Human Nature in the Integral Yoga