That’s the greeting Gary Cohn, President Trump’s former chief economic adviser, gave Larry Kudlow shortly after he was named director of the National Economic Council, according to “Team of Vipers,” a new book written by insider Cliff Sims.

Kudlow drew the snarky response from the Goldman Sachs GS, +0.01% veteran Cohn after relaying one of the president’s many strange requests: Trump allegedly had told Kudlow to stop a “special deal” that the U.S. Postal Service was giving Amazon AMZN, -1.78% .

Cohn, the book claims, said Amazon was not, in fact, getting “some special deal” and Trump was “just mad at [Jeff] Bezos” for owning the Washington Post.

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Another colorful book excerpt portraying a White House in chaos focuses on former Chief of Staff John Kelly.

“This is the worst f—king job I’ve ever had,” Kelly once said, Sims reportedly writes. “People apparently think that I care when they write that I might be fired. If that ever happened, it would be the best day I’ve had since I walked into this place. And the president knows it, too.”

The 384-page book goes on sale on Tuesday and details several of “the most defining elements” of the current White House, according to the Atlantic, which received an early copy. These include Trump’s strained relationships with high-level members of the Republican Party, frequent administration infighting and an atypical process for making policy decisions.

Sims, for his part, saw his White House stint end in spring 2018. Kelly told senior staff that Sims was “fired” for getting caught recording the president in a meeting. Sims says that’s not true and that he left to pursue another job.

“You know what, I was a viper. I was a part of that team,” Sims told ABC. “I did a bunch of things that I wish I would’ve done different, but I wanted to get into a place that was a really strong team environment.”

Watch more from that interview: