In this important project, Charles Tieszen provides a collection of primary theological sources devoted to the formational period of Christian-Muslim relations. This work provides introductions to authors along with representative selections in English translation. It is arranged according to the themes that emerge as Christians and Muslims encounter one another in this era. The result is a resource that offers students a better grasp of the texts early Christians and Muslims wrote about each other and a better understanding of the theological themes that are pertinent to Christian-Muslim dialogue today.