A Warning is an inside look at the chaotic Trump administration by a senior Trump administration official writing anonymously. It’s a follow-up to the author’s September 5, 2018, New York Times op-ed piece describing internal efforts to control Trump’s impulses. This is no longer working, "Anonymous" writes. The book depicts an impulsive and corrupt president, who puts his self-interest above the country’s interest, in the process undermining the foundations of democracy and putting national security at grave risk.

"Anonymous" describes the increasingly futile efforts of a handful of principled White House officials (referred to as the Steady State) to stave off disastrous, often illegal actions. The author warns that the "guard rails" have come off—the principled staffers have mostly been driven away and Trump is uncontrollable. If he wins another four years, he may sink the ship of democracy.