The explosive inside story of the October Surprise conspiracy, a stunning act of treason that changed American history. New York Times bestselling author Craig Unger reveals his thirty-year investigation into the secret collusion between Ronald Reagan’s 1980 presidential campaign and Iran, raising urgent questions about what happens when foreign meddling in our elections goes unpunished and what gets remembered when a covert operation results in treason and victory.

It was a tinderbox of an accusation. In April 1991, the New York Times ran an op-ed alleging that Ronald Reagan’s 1980 presidential campaign had conspired with the Iranian government to delay the release of 52 American hostages until after the 1980 election. The Iranian hostage crisis was President Jimmy Carter’s largest political vulnerability, and his lack of success freeing them ultimately sealed his fate at the ballot box.

In return for keeping Americans in captivity until Reagan assumed the oath of office, the Republicans had secretly funneled arms to Iran. Treasonous and illegal, the operation—planned and executed by Reagan’s campaign manager Bill Casey—amounted to a shadow foreign policy run by private citizens that ensured Reagan’s victory.