Islam emerged amid flourishing Christian and Jewish cultures, yet students of Antiquity and the Middle Ages mostly ignore it. Despite intensive study of late Antiquity over the last fifty years, even generous definitions of this period have reached only the eighth century, whereas Islam did not mature sufficiently to compare with Christianity or rabbinic Judaism until the tenth century. Before and After Muhammad suggests a new way of thinking about the historical relationship between the scriptural monotheisms, integrating Islam into European and West Asian history.

Garth...