1 Light on Yoga - BKS Iyengar - 1966 - Thorsons 2 Maitreya School of Healing, London.(Lily Cornford) 3 The Doctrine of the Subtle Body - GRS Mead - 1919 - Solos Press 4 Exploring Chakras - Susan G Shumsky - 2003 - New Page Books 5 The Etheric Double - Arthur E Powell - 1925 - Theosophical Publishing House 6 The Astral Body - Arthur E Powell - 1927 - Theosophical Publishing House 7 Awaken Healing Light - Mantak & Maneewan Chia - 1993 - Healing Tao Books 8 Light on Pranayama - BKS Iyengar - no date - the Crossroad Publishing Company 9 What is Lightbody? - Tashira Tachi-ren -1990 - Oughten House Publications 10 Understanding the Chakras - Peter Rendel - 1979 - The Aquarian Press 11 A Treatise on Cosmic Fire - Alice A Bailey - 1925 - Lucis Press 12 Bone Marrow Nei Kung - Mantak & Maneewan Chia - 1989 - Healing Tao Books 13 The Causal Body - Arthur E Powell - 1930ish - Theosophical Publishing House 14 The Mental Body - Arthur E Powell - 1927 - Theosophical Publishing House 15 Secret Doctrine, Vol II - H P Blavatsky - 1905 - 16 Secret Doctrine, Vol I - H P Blavatsky - 1905 - 17 Man, Visible and Invisible, Bishop CW Leadbeater - 1902 - Theosophical Publishing House 18 The Chakras, CW Leadbeater - 1927 - Theosophical Publishing House 19 Monad and other essays upon the higher consciousness - CW Leadbeater - 1920 - Kessinger Publishing