Magical Techniques of Tibet - Secret Practices of Himalayan Magic — by J.H. Brennan
This book stands a solid introduction to an extremely complex science of complimentary techniques - one enmeshed in Tibetan Buddhist legend. A highly valuable book for anyone seeking to begin their exploration of Tibetan magic.
Longchenpa's Advice from the Heart — by Namkhai Norbu
With clear introduction to the principles and practice of Dzogchen - Namkhai Norbu sets in context the thirty words of advice and then proceeds to explain each one as the basis of Longchepa's spiritual experience.