A review on Amazon says:
"Family life, morality, religion, sexuality, medicine, xenophobia and history are all presented in an interesting, subtle, and easily read writing style. When Cole grows up and decides to be a physician, he comes in contact with Jewish doctors who explain to him that the best universities are in Moslem-ruled Persia, where no Christian may go. Determined to learn, Cole overcomes this obstacle by pretending to be a Jew. As he travels and studies in Persia, the same questions of lifestyle are addressed, only this time within the Jewish and Moslem communities. This is a great read for anyone who likes adventurous stories about growing up, or who is interested in sociology, religion, medicine, or history."
It is the first of a trilogy. The writing reminds me very much of Pillars of the earth and the way Ken Follett writes.
Jean