This tantra, The Circle of Total Illumination, is a definitive expression of the apex view of Dzogchen. It presents a view that translates existentially into the Great Perfection. It is a root tantra, an explanatory tantra, a text that is the key to all other Nyingma Dzogchen tantras. It is definitive also in that it presents the nondual nature of mind just as it is, in our hearts, without any prevarication. Keith Dowman has again brought an exceptional...