This novel concerns the Desnoyers family, who move from Argentina to France just before the start of World War I. Desnoyers is a Frenchman, his wife is Argentinian and his brother-in-law is German. When tensions between Germany and France mount at the beginning of the war, the already difficult family relationships are strained. Sisters cannot understand their differing loyalties. Desnoyers cannot accept the laid-back lifestyle of his son, who prefers to tango and does not jump to enlist in the army. This son, Julio, is later devestated by a broken romance and joins the army in an attempt to heal himself. The war changes everyone. As the conflict goes on, the ideaology of the time is examined in great detail, as is the mind-set of each of the primary characters. While it takes a while to really get involved in the story, the conclusion of the book is ultimately very moving and the novel seems to make an important point about the nature of war and the bonds that tie fathers to sons. "The Four Horsemen of the Apocalypse" is clearly an important piece of historical fiction which is still relevant today.