Bob Woodward's forthcoming book on the inner-workings of the Trump White House hit No. 1 on the Amazon best-sellers list by mid-afternoon Tuesday, just as the White House issued a statement pushing back on its claims.

The book, "Fear: Trump in the White House," hit the top spot on the regularly updated Amazon.com best-sellers list for books, despite the fact that it does not come out until Sept. 11.

The Washington Post published excerpts Tuesday morning that depicted the Trump White House as a chaotic environment filled with infighting.

Trump and his aides bad-mouth each other often, according to the book, and some of the president's closest advisers have worked to push back against Trump's impulses.

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Several hours after the excerpts were first published, the White House issued a statement pushing back against the book.

“This book is nothing more than fabricated stories, many by former disgruntled employees, told to make the President look bad," White House press secretary Sarah Huckabee Sanders said in a statement.

Sanders did not refute any specific anecdotes or claims in the book, but praised Trump for his ability to "get results," and included a list of the administration's accomplishments in her statement to reporters.

Among the book's claims are that Trump called Attorney General Jeff Sessions Jefferson (Jeff) Beauregard SessionsGOP set to release controversial Biden report Trump's policies on refugees are as simple as ABCs Ocasio-Cortez, Velázquez call for convention to decide Puerto Rico status MORE "mentally retarded;" that aides snatched documents off the president's desk to keep him from seeing them and taking action; that Trump suggested assassinating Syrian President Bashar Assad; and that chief of staff John Kelly John Francis KellyMORE called Trump "unhinged" and an "idiot."

Kelly denied on Tuesday that he called Trump an "idiot." Woodward's book is the second time a report has come out claiming Kelly called his boss an "idiot."

“I spend more time with the President than anyone else, and we have an incredibly candid and strong relationship. He always knows where I stand, and he and I both know this story is total BS," Kelly said in a statement in April that he reissued Tuesday.

"I'm committed to the President, his agenda, and our country," Kelly said. "This is another pathetic attempt to smear people close to President Trump Donald John TrumpOmar fires back at Trump over rally remarks: 'This is my country' Pelosi: Trump hurrying to fill SCOTUS seat so he can repeal ObamaCare Trump mocks Biden appearance, mask use ahead of first debate MORE and distract from the administration’s many successes."

Woodward’s book is based on hundreds of hours of interviews with firsthand sources, meeting notes, personal diaries, files and documents.