Four Essential Buddhist Texts, by HH the 14th Dalai Lama, the First Panchen Lama, Jamyang Khyentse Rinpoche, Kalu Rinpoche

contains:

The Opening of the Dharma:A Brief Explanation of the Buddha's many Vehicles,
by Jamyang Khyentse Chökyi Lodrö

The Foundation of the Buddhist Meditation, by Venerable Kalu Rinpoche

The Great Seal of Voidness, a root Text for the Gelug and Kagyu, by the First Panchen Lama

A Key to the Madhyamaka, by HH the Dalai Lama 14