This teachings is from the Nyingma lineage and covers the nyingma practices from the very beginnin to the most advanced. It is over 200 pages long.

"According to the Great Perfection teachings of the Nyingma School of Tibetan Buddhism, all ofBuddhism is classified into two divisions: si'ura (exoteric teachings) and tantra (esoteric teachings). Sutric teachings are further divided into three yanas, or vehicles: those ofshravakas, pratyeka- buddhas, and mahayanists. Tantric teachings are divided into six tantras: the three outer tantras ofKriyayoga, Charyayoga, and Yoga tantra and the three inner tantras ofMahayoga, Anuyoga, and Atiyoga. These three vehi cles and six tantras constitute ·me nine yanas."