The Heart of Compassion: The Thirty-seven Verses on the Practice of a Bodhisattva
Dilgo Khyentse Rinpoche; Translated by the Padmakara Translation Group

The extraordinary set of instructions, a training manual composed in the fourteenth century by the Ngulchu Thogme Zangpo, is explained in detail by one of the great Tibetan Buddhist masters of the twentieth century, Dilgo Khyentse Rinpoche. Many generations of Buddhist practitioners of all traditions have been inspired by these teachings. Dilgo Khyentse Rinpoche’s commentary on this classic text is his most extensive recorded teaching on Mahayana practice.
Shambhala 2007