What is the author's style in Pegasus Bridge: June 6, 1944 by Stephen E. Ambrose?

The book is written in the third person point of view with the author, Stephen Ambrose, acting as the narrator. This allows him to provide the necessary background and other information that the reader needs. The author constructed the events from interviews with the various participants - British, French and German. He lets them tell the story of the capture of the bridges on D-Day.