Treasury of Precious Qualities (Book 1 & 2) — by Jigme Lingpa
Hinayana, Mahayana & Vajrayana paths explained by the great Nyingma master.
The Great Treatise on the Stages of the Path to Enlightenment — by Tsongkhapa
This is one of the brightest jewels in the world's treasury of sacred literature. The various stages of the path are presented so clearly and systematically that they can be easily understood and are inspiring to put into practice. The wisdom found in the nearly 1200 pages of this work is truly astonishing and liberating.
The Jewel Ornament of Liberation - The Wish-Fulfilling Gem of the Noble Teachings — by Gampopa
A masterwork of Tibetan Buddhism. This text has provided the backbone of study particularly in the Kagyu tradition – covering the initial entry into the path and continuing through finding a spiritual master, teachings on impermanence, karma, bodhicitta, Buddha nature, six perfections, bodhisattva bhumis, Buddhahood and the activities of Buddha.