Home to some 175 million Muslims, Bengal—incorporating today’s Bangladesh and the Indian state of West Bengal—is one of the largest but least known regions of the Muslim world. Since the medieval period, it has also reared a rich literature in the Bangla language, written by both Muslims and Hindus alike. In this episode, we’ll examine how one particular text, the Nabivamśa, helped convert many Bengalis to Islam in the seventeenth and eighteenth century. Written by Sayyid Sultan, the Nabivamśa was the first biography of the Prophet Muhammad to be written in Bangla. Yet rather than rejecting Bengal’s Vaishnava Hindu traditions, Sayyid Sultan incorporated them into his cosmic history of divine revelation. And so, as much as it was a biography of an Arabian prophet, the Nabivamśa was also a story of a Muslim Krishna who was sent by God as an heir to Abraham and a forerunner of Muhammad. Nile Green talks to Ayesha Irani, author of The Muhammad Avatara: Salvation History, Translation, and the Making of Bengali Islam (Oxford University Press, 2021), which was a finalist for the American Academy of Religion’s Book Award for Excellence in the Study of Religion.