Masters of Mahamudra - Songs and Histories of the Eighty-Four Buddhist Siddhas — by Keith Dowman

These eighty-four masters - some historical, some archetypal - accomplished this practice in India where they lived between the eighth and twelfth centuries. Leading unconventional lives, the siddhas include some of the greatest Buddhist teachers - Tilopa, Naropa, and Marpa among them.

Pointing Out the Great Way - The Stages of Meditation in the Mahamudra Tradition — by Daniel P. Brown

This book is a spiritual manual that describes the Tibetan Buddhist meditation known as mahamudra from the perspective of the 'gradual path'. Represents the needed alternative by integrating material from a variety of root texts and practical manuals.

Studies in Self-Unfoldment
— Lectures by Manly P. Hall

1 - Inward Perception
2 - The Practice of Concentration
3 - The Discipline of Retrospection
4 - The Mystery of the Transcendental Personality
5 - Realization As Illumination