Thought I should share some of the authors I have read and enjoyed. See if anyone clicks to you. They have books on yoga, ayurveda, ancient sciences , natural healing or life.

• Swami Sivananda
• Swami Vishnudevananda
• B.K.S. Iyengar 
• Dr Robert Svobda
• Dr David Frawley
• Dr Vasant Lad
• Deepak Chopra
• Paul Pitchford
• Gandhi 
• Last but not least my guru Pradip Bulsara who has 2 e-books on Apple.
• Way to learn ancient science or any , is of course you learn basic first, spend time with someone who knows it if possible, experiment , observe , share and meditate.

Enjoy !