Diplomat and scholar Charles Trueheart examines the breakdown of U.S.-South Vietnamese relations that led to the 1963 coup against President Ngo Dinh Diem, telling the story through two American diplomats with deeply personal significance: Frederick Nolting, the ambassador who supported Diem, and his successor Henry Cabot Lodge Jr., who facilitated the coup. Nolting was Trueheart's godfather; his own father, William Trueheart, served as deputy chief of mission during the crucial period. This family connection gives Trueheart access to private correspondence and personal perspectives unavailable to other historians. The book reconstructs how American policy shifted from supporting Diem to sanctioning his overthrow, examining the role of Buddhist protests, palace intrigue, and American officials' conflicting assessments. Trueheart is particularly attentive to how the breakdown in the ambassador-deputy relationship mirrored and exacerbated the breakdown in U.S.-Vietnamese relations. The coup that removed Diem, followed by his assassination, marked a turning point that locked America into an increasingly disastrous commitment. For readers interested in the Vietnam War's origins, diplomatic history, or how personal relationships shape policy decisions, this book provides intimate reconstruction of a crucial moment.