for the Stages of the Practice Sessions of the A-Tri System of Bon Dzogchen Meditation" is available in English for the very first time. Originally written by Dru Gyalwa Yungdrung (1242-1290), Geshe Sonam Gurung and Daniel P. Brown, Ph.D. faithfully translate the text from its original Tibetan under the guidance of His Holiness The Thirty-Third Menri Trizin, the head of the Bon Lineage.

A main practice manual from one of the four great lineages of Bon Great Completion meditation (dzogchen). These lineage teachings started with a fifty-session lesson plan by Ritro, and eventually was reduced to 14 sessions by Dru Gyalwa. This step-by-step practice manual, using 'intense means' of pith instruction, covers three broad areas of practice.