Literature

De Yoga Sutra's van Patanjali.
De Hatha Yoga Pradipika.
De Gheranda Samhita.
De Siva Samhita.
De Yoga Vasistha.
De Bhagavad Gita.
De Asthavakra Gita.
The Serpent Power. By Sir John Woodroffe
Yoga and Kriya. By Swami Satyananda Saraswati
Yoga Dipika. By B.K.S. Iyengar
Commentaries On Living. By J. Krishnamurti