[1] It has been described as "a riveting chronicle of government-sanctioned murder, casual elimination of “inconvenient” regimes, relentless prioritization of American corporate interests and cynical arrogance on the part of two men who were once among the most powerful in the world.

"[2] Kinzer traces how the activity of Dulles brothers "helped set off some of the world's most profound long-term crises.

Kinzer explains how the actions of the Dulles brothers aimed at removing world leaders whom they considered dangerous to the American interests.

[5] The book mentions "six monsters" that the "Dulles brothers believed had to be brought down": Mohammed Mossadegh in Iran, Jacobo Árbenz in Guatemala, Ho Chi Minh in Vietnam, Sukarno in Indonesia, Patrice Lumumba in the Congo, and Fidel Castro in Cuba.

While explaining the careers of the brothers, Kinzer describes events from American history such as mind-control experiments “in which psychoactive drugs were administered to unknowing victims.” [2][4]