The "Border Trilogy" is a series of three novels by American author Cormac McCarthy, consisting of "All the Pretty Horses," "The Crossing," and "Cities of the Plain." Set against the backdrop of the American Southwest and Mexico, these novels explore themes of love, loss, and the search for identity. The stories follow the journeys of young men as they navigate the complexities of life along the U.S.-Mexico border. Each book features rich, lyrical prose and deep philosophical reflections, showcasing McCarthy's distinctive writing style. The trilogy is often praised for its vivid imagery and exploration of the human condition, making it a significant contribution to contemporary American literature.