The Life of Longchenpa, The Omniscient Dharma King of the Vast Expanse, compiled and edited by Jampa Mackenzie Stewart.                                  https://www.shambhala.com/the-life-of-longchenpa-2946.html. This is a wonderful resource for anyone interested in the path of the Longchen Nyingthig, the teachings and transmissions of Longchen Rabjam. Introduction to the book is by Yangthang Tulku Rinpoche. The publisher is now Shambala. The original publisher was Snow Lion which was purchased by Shambala.Check out Samden Ling  web page for a full list dharma books under the tab ‘programs’ https://www.samdenling.org/study-group/