Enemy of Peace" is a science fiction novel written in the mid-20th century. Set in a post-apocalyptic America recovering from the devastation of nuclear war, the story focuses on themes of power, tyranny, and the struggle for peace. It explores the conflict between two cities, Center City and Northburg, and their respective leaders who embody contrasting ideologies regarding governance and survival. The narrative centers around Lloyd Riddell, the determined mayor of Center City, who has worked tirelessly to rebuild his community after the chaos and destruction of war. As tensions rise with Northburg, led by the power-hungry David Barr, Riddell is forced to confront the threat of invasion. Riddell insists on seeking a non-violent resolution, reflecting his commitment to peace despite immense provocation. As he infiltrates Northburg disguised as a soldier, he learns of Barr's oppressive regime that relies on fear and manipulation. Ultimately, the climax of the story reveals Riddell’s grappling with the morality of violence in the pursuit of peace, leading to a decisive confrontation where he takes Barr's life to eliminate the threat, signaling a paradoxical resolution to the struggle between peace and tyranny.