What is the author's style in Titan: The Life of John D. Rockefeller, Sr by Ron Chernow?

The book is written from the perspective of the author, Ron Chernow, and is presented from the third person point of view. There are plenty of quotes and dialogue due to the intense research of the author. The use of the third person allows the author to provide the background details that are necessary, especially for a book of this nature.