Secret Doctrines of The Tibetan Books of The Dead
— by Detlef Ingo Lauf

Detailed portrayal of the teachings and the iconography that play a major role in the Tibetan understanding of death and dying.

Matrix of Mystery - Scientific and Humanistic Aspects of rDzogs-chen Thought — by Herbert V. Guenther

The first comprehensive study of the Dzogchen or Ati tradition of the Nyingma school of Tibetan Buddhism.