In this volume of Choying Tobden Dorje's The Complete Nyingma Tradition from Sutra to Tantra, Heidi Nevin translates, for the first time, books 19 and 20 on the ground and view of the great Perfection Atiyoga. Complete Nyingma Tradition from Sutra to Tantra, Books 19 and 20 , is a comprehensive exploration of Atiyoga, the most advanced set of practices within the Nyingma tradition of Tibetan Buddhism. This fifth volume of the Complete Nyingma Tradition series presents the profound teachings of the Great Perfection, or Dzogchen, offering an intricate examination of awareness, consciousness, and spiritual realization. The text traces the historical lineage of these teachings, illuminating the transmission of wisdom through generations of realized masters. It articulates the nuanced relationship between delusion and wisdom, samsara and nirvana, demonstrating their fundamental interconnectedness. Masterfully translated by Heidi Nevin, this volume includes a glossary, translator's introduction, and extensive annotations to guide the reader. Through detailed analysis of mental afflictions, empowerments, and the nature of ground-appearances, the work provides a traditional investigation into the transformative potential of Nyingma Buddhist practices. It presents an understanding of consciousness that bridges philosophical discourse and experiential wisdom.