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Russian Roulette is a story of political skullduggery unprecedented in American history. It weaves together tales of international intrigue, cyber espionage, and superpower rivalry.

After U.S.-Russia relations soured, as Vladimir Putin moved to reassert Russian strength on the global stage, Moscow trained its best hackers and trolls on U.S. political targets and exploited WikiLeaks to disseminate information that could affect the 2016 election.

Russian Roulette chronicles and explores this bizarre scandal, explains the stakes, and answers one of the biggest questions in American politics: How and why did a foreign government infiltrate the country's political process and gain influence in Washington?

Michael Isikoff is an investigative journalist who has worked for the Washington Post, Newsweek, and NBC News.

David Corn is a veteran Washington journalist and political commentator. He is the Washington bureau chief for Mother Jones magazine and an analyst for MSNBC.