Historian and theologian Arthur Green has long studied Jewish religion and culture. Among the many books he has written is his latest, A Guide to the Zohar.
The Zohar is a collection of writings and teaching that appeared in the 13th century. It is the basis of kabbalah, a mystical extension of Judaism identified with alphanumeric codes and esoteric symbols. Green's Guide to the Zohar is an overview of modern studies of kabbalah's medieval origins.