"Gavin Kilty is known to readers of The Library of Tibetan Classics as the translator of Khedrup Norsang Gyatso's study of Kalacakra tantra. The present volume makes another highly significant contribution to our understanding of yet another domain of Tibetan knowledge, namely, the origin and development of the Tibetan health sciences. Desi Sangye Gyatso, the author of the Mirror of Beryl, was the most powerful man in Central Tibet and had access to the very best library resources. His 1703 work is a tour de force, built as much on what earlier Tibetan scholars had written on the subject as on his immediate knowledge of the field. Gavin Kilty's translation is as elegant and accurate as his earlier work and is a testimony to his fine understanding of the original Tibetan text. This is a truly wonderful book, one that I and others will no doubt consult with pleasure time and again for years to come."

– Leonard W. J. van der Kuijp, Professor of Tibetan and Himalayan Studies, Harvard University