The socio-cultural history of pre-Ahom Assam has so far been primarily the studies of Brahmanical elements. The writers have paid less attention to Buddhism and on the Buddhist sources in undertaking their historical researches. This is a study to fill up the gap in the socio-cultural history of ancient Assam. The focus of this study is on the different Mahayana forms that existed in pre-Ahom Assam. The book traces the beginnings and development of Buddhism in Assam and examines the impact of Buddhism on society and culture of pre-Ahom Assam and vice-versa mainly in the BrahmaputraValley.