Christopher Isherwood & Swami Prabhavananda 
How to Know God [PDF ebook] 
The Yoga Aphorisms of Patanjali

The aphorisms collected in this book, first published in 1953, were composed by Patanjali, a great Indian sage, over 1, 500 years ago, and here translated into clear English prose. The accompanying commentary interprets the sayings for the modern world, and in doing so gives a full picture of what yoga is, what its aims are, and how it can be practised.