One thing's for sure about Bob Woodward's book, “Fear: Trump In the White House”: Steven Bannon was one of his “deep background” sources. 

It's not just that he comes off well. We actually know what he's thinking. As in this scene between Bannon and Gov. Chris Christie after the “Access Hollywood” story broke in Oct. 2016 and Bannon urged Trump to follow his instincts and play offense (“that's in the past,” “locker room talk,” “Bill Clinton was way worse”) rather than defense (“I'm sorry, so sorry”):

“You‘re the fucking problem,” Christie said to Bannon. “You’ve been the problem since the beginning.”

“What are you talking about?”

“You‘re the enabler. You play to every one of his worst instincts. This thing’s over, and you‘re going to be blamed. Every time he’s got terrible instincts for these things, and all you do is get him all worked up. This is going to be humiliating.” Christie was in Bannon's face, looming large. Bannon half-wanted to say, You fat fuck, let's throw down right here.

The only way Bannon isn't a source is if Bannon told several people this story, including his thoughts, and they relayed it to Woodward. 

You can pretty much tell when someone is a source. At one point, Sen. Lindsey Graham makes an appearance and it's suddenly all about him. That's actually when they book gets dull: When Graham enters the room, dispenses wisdom, and saves the world to—one imagines—the applause that's only going on in his head.