The Precious Treasury of Philosophical Systems discusses the philosophical tenets of the entire spectrum of Buddhist teachings-Hinayana, Mahayana, Vajrayana, and Dzogchen. This series consists of the volumes written by Longchen Rabjam that that, as a group, have come to be known as The seven Treasuries. Although, Longchenpa did not intend them to be series, scholars traditionally treat them as such because of their interrelated themes.
Struggling; it's very dense. But it's a must read!
6 months since starting Ch. 3, am finally finishing it. Not surprising, since it covers the entire four systems of the causal vehicles. I wonder whether Rinpoche will be moving on to the paths of the causal vehicles or whether that is next 'semester.