Originating in India, Mahayana Buddhism spread to Central Asia, Tibet, Mongolia, China, Japan and other countries of East Asia. In Tibet and East Asia, Mahayana eventually became the prevalent form of Buddhism. Western interest in Mahayana has increased considerably over the last twenty-five years, reflected both in the quantity of scholarly material produced and also in the attraction of Westerners towards Tibetan Buddhism and Zen. In this book Paul Williams, himself a practising Buddhist, provide an up-to-date and accurate account of the principles of Mahayana Buddhism as they are found in both the Indo-Tibetan and East Asian forms of Mahayana. It seeks to introduce and reflect some of the recent scholarly work in the field, and in particular the book is concerned to convey the diversity and richness of Mahayana Buddhism, a diversity which prevents any attempt at simple definition.