For more than a decade, America has been waging a new kind of war against the financial networks of rogue regimes, proliferators, terrorist groups, and criminal syndicates. Juan Zarate, a chief architect of modern financial warfare and a former senior Treasury and White House official, pulls back the curtain on this shadowy world. In this gripping story, he explains in unprecedented detail how a small, dedicated group of officials redefined the Treasury’s role and used its unique powers, relationships, and reputation to apply financial pressure against America’s enemies.