For President Trump, leaks are maddening and anonymity is infuriating. So the release of “A Warning,” the new book by “Anonymous,” an unidentified senior official in the Trump administration who first wrote about the current White House in an opinion article in The New York Times, did not make for a good Friday for the president.

Here are some takeaways about what the book shows — and about what it doesn’t.

The picture it paints of the president and the White House is bleak, but not new.

“The White House, quite simply, is broken,” the author says at one point. At another, the author writes that the president often acts on his impulses, even when he’s been talked out of them, whether it’s in relation to policy matters or possibly dismissing a staff member.

“His cyclical urges can’t be suppressed for long,” the author writes.

His lack of interest in other branches of government is a constant theme.

“Don’t worry about Congress,” he is supposed to have told an aide. “Just do what you need to do.”

These ideas don’t tread new ground — the themes were hit on, in more elaborate detail, in books by Michael Wolff and Bob Woodward earlier in the Trump presidency. Both writers painted the Trump presidency as aberrant and potentially dangerous, with detailed scenes describing actions by the president.