What is the author's tone in Ghost Soldiers: The Epic Account of World War II's Greatest Rescue Mission by Hampton Sides?

The book is written is a fairly subjective journalistic tone from the third-person point of view. The author is obviously personally invested in the material and makes frequent but minor judgments upon historic events. The writing is informal and obviously not intended as a rigorous military history; instead, the book tries to tell a story in a cohesive and accessible way.