The Iron Corners; or, Milio and Carvel: A Tale of the Albigensian Crusades by Jean-Eugène Xu is a gripping novel-story that tells the story of two friends caught up in the whirlwind of events of the Albigensian Crusades. In this fascinating historical essay, readers will see the complex relationships between the characters, feel the tension of the battles and the rendering of the historical atmosphere of the Middle Ages. The author skillfully reveals the inner world of the heroes, using a penetrating psychological approach. The book "Iron Corners; or, Milio and Carvel: a story from the Albigensian Crusades" not only tells about historical events, but also makes the reader think about loyalty, friendship and sacrifice.