Waldemar Heckel is professor in the department of Greek and Roman studies at the University of Calgary. A scholar of the age of Alexander the Great, he is the author of The Marshals of Alexander's Empire and Who's Who in the Age of Alexander the Great: Prosopography of Alexander's Empire, which was listed by the Times Literary Supplement as among 'the best books of 2006'. Dr Heckel is one of the founding editors of the Ancient History Bulletin and has collaborated with J. C. Yardley on a number of translations of, and commentaries on, the Alexander Historians.