Frank L. Holt is Professor of History at the University of Houston. He is the author of "Alexander the Great and the Mystery of the Elephant Medallions "(California, 2003), "Thundering Zeus: The Making of Hellenistic Bactria "(California, 1999), and "Alexander the Great and Bactria: The Formation of a Greek Frontier in Central Asia "(1988) and editor of "The Greeks in Bactria and India "(1985).