Yoga
Strongly Recommended Reading:
The books on this list are generally available, though some may now be out of print.
  • Patanjali. Yoga Sutra, chapters 1 and 2 (translation of your choice)
  • Anonymous. Bhagavad Gita (translation of your choice)
  • Svatmarama. Hatha Yoga Pradipika (recommended translation YogaVidya.com)
  • Elizabeth de Michelis. A History of Modern Yoga (chapters 6 and 7)

Recommended Reading:
  • Anonymous. Gheranda Samhita (recommended translation YogaVidya.com)
  • Anonymous. Shiva Samhita (recommended translation YogaVidya.com)
  • Georg Feuerstein. The Shambhala Guide to Yoga
  • Georg Feuerstein. The Yoga Tradition (for more ambitious students)     
  • Georg Feuerstein. The Deeper Dimension of Yoga
  • NE Sjoman. The Yoga Tradition of the Mysore Palace
Reading difficulty:

*   - Accessible to all
**  - Challenging
*** - Scholarly
Primary Sources:
  • Wendy Doniger O’Flaherty, trans. The Rig Veda *
  • David Frawley. Wisdom of the Ancient Seers *
  • Ralph Griffith. Hinduism: The Rig Veda ***
The Vedas
Primary Sources:
  • R.E. Hume, trans. The Thirteen Principal Upanishads ***
  • Valerie Roebuck, trans. The Upanishads **
  • Patrick Olivelle, trans. Upanishads ***

Secondary Sources:
  • Paul Deussen. The System of the Vedanta ***
  • Franklin Merrell-Wolff. Pathways Through to Space **
  • Badarayana. The Vedanta Sutras (trans. G. Thibaut) ***
Vedanta Upanishads
Translations:
  • Franklin Edgerton. The Bhagavad Gita **                        
  • Lars Fosse. The Bhagavad Gita *
  • Juan Mascaro. The Bhagavad Gita *
  • Swami Prabhavananda and C. Isherwood. The Song of God *
  • S. Radhakrishnan. The Bhagavadgita **
  • Barbara Stoler Miller. The Bhagavad-Gita *
  • Stephen Mitchell. Bhagavad Gita *
  • Graham Schweig, The Bhagavad Gita **
  • R.C. Zaehner. The Bhagavad-Gita ***

Secondary Sources:
  • Georg Feuerstein. Introduction to the Bhagavad Gita *
  • Eric Sharpe. The Universal Gita *
  • Phulgenda Sinha. The Gita As It Was **
Bhagavad Gita
Translations:
  • Usharbudh Arya. The Yoga-Sutras of Patanjali (pada 1) ***
  • Swami Veda Bharati (formerly U Arya) (pada 2) ***
  • Hariharananda Aranya. Yoga Philosophy of Patanjali ***
  • Bernard Bouanchaud. The Essence of Yoga *
  • T.K.V. Desikachar. The Heart of Yoga *
  • Georg Feuerstein. The Yoga-Sutra of Patanjali  **
  • Chip Hartranft. The Yoga-Sutra of Patanjali *
  • B.K.S. Iyengar. Light on the Yoga Sutras of Patanjali *
  • Rammurti Mishra. Yoga Sutras **
  • Swami Prabhavananda and C. Isherwood. How to Know God *
  • Swami Savitripriya. Psychology of Mystical Awakening *
  • Barbara Stoler Miller. Yoga: Discipline of Freedom *
  • I.K. Taimni. The Science of Yoga **
  • Swami Venkatesananda. Enlightened Living *
  • Swami Vivekananda. Raja-Yoga **

Secondary Sources:
  • Mircea Eliade. Patanjali and Yoga **
  • Georg Feuerstein. The Philosophy of Classical Yoga *
  • Ian Whicher. The Integrity of the Yoga Darshana ***
Classical Yoga: The Yoga Sutra
Primary Sources:
  • Svatmarama Yogendra. Hatha Yoga Pradipika (trans. Swami Vishnu-devananda) *
  • Svatmarama Yogendra. Hatha Yoga Pradipika (trans. Swami Muktibodhananda Saraswati) *

Secondary Sources:
  • Agehananda Bharati. The Tantric Tradition ***
  • Theos Bernard. Hatha Yoga *
  • Mikel Burley. Hatha-Yoga *        
  • Mark Dyczkowski. The Doctrine of Vibration **
  • Julius Evola. The Yoga of Power **
  • Gavin Flood. The Tantric Body **
  • Shyam Sundar Goswami. Layayoga **
  • Paul Eduardo Muller-Ortega. The Triadic Heart of Shiva **
  • Swami Sivananda Radha. Kundalini Yoga for the West *        
  • Lilian Silburn. Kundalini **
  • Hugh Urban. Tantra *
  • David Gordon White. The Alchemical Body **
  • John Woodroffe (Arthur Avalon). The Serpent Power ***
Tantra & Hatha Yoga
Krishnamacharya School:
  • Kofi Busia, ed. Iyengar: The Yoga Master *
  • T.K.V. Desikachar. Health, Healing & Beyond *
  • B.K.S. Iyengar. Light on Life *
  • B.K.S. Iyengar. The Tree of Yoga *
  • Elizabeth Kadetsky. First There Is a Mountain *
  • Nathamuni. Yogarahasya (trans. T.K.V. Desikachar) *
  • Srivatsa Ramaswami. Yoga Beneath the Surface *

Teachers:
  • David Goodman, ed. Be As You Are: The Teachings of Sri Ramana Maharshi *
  • Robert McDermott, ed. The Essential Aurobindo *
  • Sarah Strauss. Positioning Yoga (Swami Sivananda) **
Modern Schools/Teachers
Primary:
  • Patrick Olivelle, trans. Samnyasa Upanishads **
  • Tirumular. Tiru-Mantiram (trans. B. Natarajan) **
  • Vasugupta. The Aphorisms of Shiva (Shiva Sutra)(trans. M Dyczkowski) **
  • Anon. The Yoga of Delight, Wonder, and Astonishment (the Vijnana Bhairava) (trans. J Singh) *

Secondary:
  • Joseph Alter. Yoga in Modern India **
  • Agehananda Bharati. The Light at the Center *
  • Paul Brunton. A Search in Secret India  *
  • Roberto Calasso. Ka *
  • Alain Danielou. The Gods of India *
  • Alain Danielou-. While the Gods Play **
  • Alain Danielou. Yoga **
  • Mircea Eliade. Yoga: Immortality and Freedom ***
  • Gavin Flood. A Introduction to Hinduism  *
  • Jean Gebser. The Ever-Present Origin ******
  • John Keay. India: A History  *
  • Lewis Thompson. Mirror to the Light **
  • Heinrich Zimmer. Philosophies of India **
Other Sources of Interest