Rigdzin Jigme Lingpa (1730-1798) was a great master of the Nyingma tradition of Tibetan Buddhism. The root of the Khyentse lineage, he was a tert n, or discoverer of treasure teachings, and revealed the Longchen Nyingtik, one of the most important cycles of meditative practice in the Nyingma school.
I believe the members of the Padmakara Translation Group have taken great pains to render a clear, accessible English translation that readers will find illuminating. His Holiness the Dalai Lama