The Perfection of Wisdom Sutras, The Prajnaparamita, is a collection of about forty texts. They were composed in India between approximately 100 BC and AD 600. Those contained within this volume are among the shorter ones; they are also some of the most well known such as The Heart Sutra and The Diamond Sutra. The Prajnaparamita texts are central to the Mahayana, the Great Vehicle tradition of Buddhism which today includes the Zen and Tibetan traditions. They are a magnificent work which offer guidance to those who wish to plumb the depths of their own mind and come face to face with the reality of existence by realising the truth of the Buddha's deep teachings on Emptiness and Great Wisdom. Dr Edward Conze (1904-1979) was the author of many books and the translator of much of the Prajnaparamita texts. He served on the faculties of several universities in Britain and the United States including Oxford, London, and California. Not only was he a great Buddhist scholar but also a serious practitioner, and his translations are very highly regarded.