What is the author's style in Flags of Our Fathers by James Bradley?

"Flags of Our Fathers" is written in the third-person narrative. The author of the book, James Bradley, is the son of one of the six Marines who hoisted the make-shift flagpole affixed with an American flag atop Mount Suribachi on Iwo Jima during World War II. A photo of the event became one of the most iconic images in the history of America.