If it’s made up…people directly quoted will sue. But the author has stated all the interviews are recorded. If no serious law suits are brought forward…it will tell you that the author was pretty accurate as to what staffers and those around DJR TOLD HIM.
Now the people feeding the author the “gossip” might be full of it…but these are supposed to be the people directly serving the President. Do some of them have an anti Trump agenda? Maybe…who really knows?
But just because info is something one disagrees with or makes feel unconfortable…doesn’t mean it’s automatically fake. That’s too easy and convenient