"A fascinating and carefully argued study that raises a number of momentous questions about early Islamic tradition." (Critical Studies on Religion) "Zayd is philologically rigorous and exhibits a sophisticated understanding of the complicated intertwinings of Jewish, Christian, and Muslim literary works." (John C. Reeves, University of North Carolina, Charlotte) "The discovery of linkages between biblical texts and Islamic sources stands at the frontier of the study of early Islam today, and Powers contributes a remarkably interesting biography of Zayd in this direction." (Tayeb El-Hibri, University of Massachusetts, Amherst)