17 classes on the Samadhi Pada, the important 1st section of the Yoga Sutras of Patanjali. The first half of the Samadhi Pada deals with the nature of the self.
Classes 1-11 have been delivered by Pujya Swamiji who covered the Sutras 1 to 21. The remaining 6 classes (12-17) have been taken by Swami Tattvavidananda Saraswati who covered Sutras 17-26.