The book "Allied Boys at Liege; or, Across the Steel Lines" is written by Clair W. Hayes. This is an exciting adventure novel that tells about military events during the First World War. The main characters, young boys, become allies in difficult times and are forced to show courage, ingenuity and bravery in order to survive in the conditions of war. The author describes in detail the battles, strategic actions and interaction of the characters, transporting readers to the era of the great war. Anyone interested in history or the adventure genre will enjoy this book.