This seminal work continues to shape the thought of specialists studying the Late Antique crossroads at which Christian, Jewish, Zoroastrian, and Islamic histories met, by offering the field a new approach to the vexing question of how to write the early history of Islam. The new edition of the study produces the original text with the addition of a substantial forward in which Hoyland discusses how the field has developed over the two decades that proceeded the book’s first publication. Hoyland also shares some personal reflections on how his thinking has since developed and the potential impact of this on the findings of the original study. The book also includes new appendices that detail the later publications of the author.