I am reading Lamin Sanneh's book, Disciples of All Nations. Sanneh is currently the D. Willis James Professor of Missions and World Christianity and Professor of History at Yale Divinity School. Sanneh was born in Gambia, and studied at a number of institutions throughout the world, including the University of London, where he received a Ph.D. in Islamic History. He has written a number number of books and articles on the relationship between Islam and Christianity. Sanneh converted to Christianity from Islam.