The book 'Life of Lieutenant Michael Carlier, Trappist Monk, Soldier: A Model of Virtue In The Cloister and A Hero In The Great War' is a biographical account of the life of Michael Carlier, a Trappist monk who also served as a soldier in the Great War. The book details Carlier's early life as a devout Catholic who joined the Trappist order and lived a life of asceticism and contemplation. Despite his dedication to the monastic life, Carlier felt called to serve his country and enlisted in the French army during World War I. The book chronicles Carlier's experiences as a soldier, including his bravery in battle and his eventual promotion to lieutenant. Despite the horrors of war, Carlier remained committed to his faith and continued to live a life of virtue, even in the midst of the chaos and destruction around him. After the war, Carlier returned to the Trappist monastery and continued to live a life of devotion and service.