Düdjom Lingpa (1835–1904) was one of the foremost tantric masters of nineteenth-century Tibet, and his powerful voice resonates strongly among Buddhist practitioners today. The Vajra Essence is Düdjom Lingpa’s most extended meditation on the path of Great Perfection, in many senses a commentary on all his other Dzogchen works. This is the first translation of this seminal work in any Western language, and B. Alan Wallace, with his forty-five-plus years of extensive learning and deep meditative experience, is one of the most accomplished translators of Tibetan texts into English.Translated by B. Alan Wallace.