Former Attorney General Bill Barr has attacked former U.S. President Donald Trump on his new book entitled "One Damn Thing After Another."

Barr's 600-page memoir is due to hit the shelves on March 8, with reports saying that Barr used the new book to attack Trump's credibility, leadership, and temperament. He also formed his own service during the Trump administration as a "personal sacrifice," according to The Daily Wire report.

Barr also made his stance clear on Trump's claim that the 2020 presidential election was stolen from him. The former attorney general said that the election was not stolen from Trump and that the former president lost it.

Barr claimed that the loss might have been avoided if Trump behaved differently in the weeks and months prior to the election. He added that the former president could have had "just exercised a modicum of self-restraint, moderating even a little of his pettiness."

Critics lashed out at Barr for not having come forward earlier, saying that he might have been able to do something to change Trump's behavior.

Legal analyst Joyce Vance tweeted about Barr's new book, as well as Sherrilyn Ifill, who is the president and director-counsel of the NAACP Legal Defense Fund.

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Bill Barr's New Book

Barr also discussed in his book how country and principle "took second place" during the Trump administration.

He then went on to say that the United States needs leaders not only capable of fighting and "punching" but also leaders who can frame and advocate for an uplifting vision of what it means to be an American citizen.

Barr said that Trump has shown that he has "neither the temperament nor persuasive powers" to deliver the kind of positive leadership, according to an Insider report.

In addition, the former attorney general cited Monday lunches with other White House attorneys, discussing a series of the "legally problematic ideas floating around the administration." The discussion includes Trump's aim to end birthright citizenship.

Barr also said in his upcoming book that the possibility of Trump running for the presidency again is "dismaying." He then called the Republican Party to look at other candidates.

He describes Trump as "incorrigible narcissist" who lack self-control, according to The Washington Post report.

Barr wrote in his book that White House lawyers operated like "a tag team," and referred to the act as "eat the grenade."

The former attorney general also cited that the former president had broached the subject of Hunter Biden, U.S. President Joe Biden's son, in mid-October 2020.

Barr said that he responded to Trump's talk by saying that he is not going to talk to him about Hunter Biden.

The gap in Barr and Trump's relationship appeared to have started when he refused to support the former president's claims of widespread election fraud. He said that he marshaled the Justice Department and the Federal Bureau of Investigation to probe fraud claims.

Barr wrote that in each instance, the agency officials could not find any evidence to support the former president's claims of election fraud.

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Written by: Mary Webber

WATCH: Former AG Barr says Trump's election fraud claims were found to be false - from Good Morning America