What is the author's tone in The Brethren: Inside the Supreme Court by Bob Woodward and Scott Armstrong?

The book is written in an objective third person point of view. Woodward and Armstrong are telling a story of what goes on at the Court and they comprise the third person who is telling the story. The book, even though dealing with factual events, reads like a novel with the reader waiting to see what happens next. The authors discuss some of the issues involved in the cases but in a non-emotional way. They don't let on what their own points of view are about controversial subjects like abortion or the death penalty and they don't try to force any viewpoints on the reader at any time.