In this rich, fascinating history, John Ghazvinian traces the complex story of the relations of these two powers back to the Persian Empire of the eighteenth century—the subject of great admiration of Thomas Jefferson and John Quincy Adams—and an America seen by Iranians as an ideal to emulate for their own government. Drawing on years of archival research both in the US and Iran—including access to Iranian government archives rarely available to western scholars—the Iranian-born, Oxford-educated historian leads us through the four seasons of US-Iran relations: the 'spring' of mutual fascination; the 'summer' of early interactions; the 'autumn' of close strategic ties; and the long, dark 'winter' of mutual hatred. Ghazvinian, with grasp and a storyteller's ability, makes clear where, how, and when it all went wrong. And shows why two countries that once had such heartfelt admiration for each other became such committed enemies; showing us, as well, how it didn't have to turn out this way.