The third volume, published in two parts, is an account of every aspect of Iranian civilisation from the death of Alexander in 323 BC to the advent of Islam in the seventh century AD. This complex period, of major importance in Iranian history and extending for almost a thousand years, encompasses the reigns of the Seleucid, the Parthian, the Kushan and Sasanian dynasties. As additions to the general objectives of these volumes, Professor Yar-Shater has included in this volume chapters on the institutional, administrative, legal, numismatic, linguistic and literary aspects of the period; and he further develops the scope of the volume by including studies of Iran's interaction with neighbouring societies, of Iran's mythical and legendary history, and of Iranian settlements outside the geographical boundaries of Iran and Afghanistan. This volume is the most comprehensive study published of this very important period of Iran's history.