John Blofeld 
The Way of Power [PDF ebook] 
A Practical Guide to the Tantric Mysticism of Tibet

First published in 1970, The Way of Power is an exploration of the school of Mahayana Buddhism prevalent in Tibet and Mongolia, known as the Vajrayana.

Divided into two parts, the book provides an introduction to the background and theory behind the Vajrayana before progressing to a study of Vajrayana in practice. In doing so, it provides an overview of the history, development, and contemporary status of the Vajrayana, and takes a look at the different schools and sects. The book’s primary focus is the use of Tantric mystical techniques.

The Way of Power will appeal to those with an interest in Buddhism, religious psychology, and religious history.