Book excerpt: Divine Harmony describes Pythagoras's wanderings in ancient Phoenicia, Egypt, Babylon, and Greece, and explores key Pythagorean ideas as taught at his scholarly community in southern Italy. This fascinating study of the sixth-century Greek scientist and mystic includes illustrations, a map, a new introduction, and an updated bibliography. Drawing on the writings of Pythagoras's disciples, the authors present a lively portrait of a man whose ideas continue to resonate.