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

The authors are both professional writers and newsmen. Bob Woodward has written several other books and has his own off-the-record style which comes through in this book. The authors don't let on that they are the press but they are and they are telling the story of how the Supreme Court functions. They are on the scene in Washington where the action is. They know many of the personalities involved and have covered some of the major events discussed. There are many rare insights into the inner workings of the Court that are revealed from this book.