Trump urged people not to buy the book one day before its release, tweeting: "Don't buy, boring!"

The @WashingtonPost quickly put together a hit job book on me- comprised of copies of some of their inaccurate stories. Don't buy, boring! — Donald J. Trump (@realDonaldTrump) August 23, 2016

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Trump over the past few months spent more than 20 hours speaking with the Post reporters working on the biography, "Trump Revealed: An American Journey of Ambition, Ego, Money, and Power," according to the newspaper.

"Trump was gracious and generous with his time, took nearly all of our questions, and often extended the length of our interviews, sometimes doubling or tripling the allotted time. That level of cooperation was a surprising switch from the campaign’s initial reaction to the book," reads an adapted excerpt from the book.