(Image source from: Free Press Journal)

The United States President Donald Trump has slammed an explosive book about his administration.

Trump on Wednesday said the book, written by the U.S. veteran investigative journalist Bob Woodward, "means nothing" and called it "a work of fiction" during a photo op with visiting Kuwaiti Emir Sheikh Sabah Al-Ahmad Al-Jaber Al-Sabah at the White House, Xinhua reported.

Woodward's book - "Fear: Trump in the White House" - is to be released next week. According to excerpts obtained by media outlets, Trump's aides describe him as a "liar" and an "idiot" who is running a "crazytown." "Isn't it a shame that someone can write an article or book, totally makeup stories and form a picture of a person that is literally the exact opposite of the fact, and get away with it without retribution or cost," Trump tweeted on Wednesday.

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He also tweeted out written statements of White House Chief of Staff John Kelly and Secretary of Defence James Mattis, both of whom denied uttering quoted criticisms of the president in the book.

In a statement to The Washington Post, Woodward said, "I stand by my reporting."

According to the author, the book was based on hundreds of hours of conversations with direct players. Since 1971, Woodward has been a reporter at the Washington Post and remains an associate editor there. He is most famed for breaking the story of the Watergate scandal, which prompted the resignation of Richard Nixon from the presidency in 1974.

By Sowmya Sangam