This study of the Twenty Verses on the Great Vehicle and the Verses on the Heart of Dependent Origination provides readable translations of the texts, followed by text-critical material, edited Tibetan, and wide-ranging commentary. Detailed editions of and comments upon eighth- or ninth-century A.D. Dunhuang manuscripts of the Heart of Dependent Origination are included. Anyone interested in the second-century Buddhist philosopher Nāgārjuna will be interested in this book.