Here, publically available in English for the first time, are the heart teachings of ancient Bonpo Dzogchen Masters, translated Masters, translated and commented on by Yongdzin Lopon Tenzin Namdak Rinpoche, the current holder of this unique linage. Part of a living heritage, Masters of the Zhang Zhung Nyengyud carries not only words of instructions and stories but also blesssings, and as such it can become a key to unlocking the doors of our mind, a guide on the path to realizing the true Nature of Mind.