“Nothing short of horrifying . . . Dupes may be one of the most significant literary offerings of our time.” —Washington Times

“A detailed, riveting history of those who secretly served the enemy. Not to be missed!” —PETER SCHWEIZER, bestselling author of Clinton Cash and Secret Empires

Uncovering previously unpublished FBI files and documents from the Soviet archives, bestselling historian Paul Kengor exposes the legions of liberals who have unwittingly aided America’s adversaries—from the Bolshevik Revolution through the Cold War and right up to the present.

Now in paperback with an updated introduction.