Michael Wolff has, for years, been a prime piranha in the Manhattan media pond, using his caustic columns to tear into his lunchmates at Michael's, the New York midtown mogul canteen, and cutting a memorable figure at star-speckled dinner parties, clad in Charvet ties and shirts by the London haberdashery Browns.

His arsenic-laced prose was well known among powerful figures like Rupert Murdoch, whose life Wolff chronicled in a 2008 biography that left its subject displeased. But his nose for first-class gossip kept the machers circling.

Now, the Wolff formula has been applied to a far bigger canvas: presidential politics. It is proving to be his most successful provocation to date.

"Fire and Fury: Inside the Trump White House," his insider account of the year he spent reporting from the West Wing, has drawn denunciations from the White House lectern, threatened the career of the Breitbart News leader Stephen K. Bannon and turned Wolff, an overnight sensation at age 64, into one of the world's most famous journalists.

On Thursday, Trump's lawyers threatened to sue Wolff's publisher, Henry Holt, if it did not halt the book's release and apologise for its contents - an extraordinary attempt by a sitting president to stifle critical coverage. Henry Holt responded by moving up the book's release by four days. Wolff may be looking at his first No. 1 best seller.

Even for the brazenly confident Wolff, a status-mad needler with a habit of being ejected from expensive restaurants, this is a new level of notoriety. He is accustomed to angering the Manhattan power elite, not the leader of the free world. "It's almost a natural evolution of Michael Wolff, that one day the president would be talking about him from the White House," said Janice Min, the former editor of The Hollywood Reporter, where Wolff is a columnist.

His acidic portrayal of Trump as a president in over his head, disdained by aides who are astounded by his lack of fitness for the job, has dominated headlines and social media for days, along with his purportedly verbatim quotes from figures like Bannon and Murdoch dismissing Trump as a fool.

But Wolff has picked up as many foes as fans during his years as a slashing columnist - perhaps more, even - and critics have raised questions about the veracity of his reporting, saying that he has a history of being casual with his facts.

"Historically, one of the problems with Wolff's omniscience is that while he may know all, he gets some of it wrong," David Carr, the late New York Times media columnist, wrote in 2008, reviewing a Wolff book that, he pointed out, contained errors.

The excerpts from "Fire and Fury" that appeared this week have been raked over for mistakes. Wolff writes that CNN reported on Trump being accused of an exotic sexual practice with prostitutes in an intelligence dossier; in fact, BuzzFeed News reported those details. He also describes Trump as being unaware of the identity of John Boehner, the former Republican House speaker; in fact, the pair had golfed together long before Wolff began visiting the White House.

Other details have been disputed. Thomas Barrack jnr, a close Trump friend, denied that he said the president was "not only crazy, he's stupid," as Wolff reports. On Thursday, the White House press secretary, Sarah Huckabee Sanders, said the book contained "mistake, after mistake, after mistake".

Wolff, who declined to be interviewed for this article, stands by his reporting. And his publisher is apparently undaunted by the president's threats. "We see 'Fire and Fury' as an extraordinary contribution to our national discourse, and are proceeding with the publication of the book," Henry Holt said in a statement on Thursday.

Bannon has not disputed his quotes in the book, even as the material has damaged him politically and perhaps professionally: Several Republican politicians have distanced themselves from him, and one of his key financial backers, the hedge fund heiress Rebekah Mercer, a funder of Breitbart, said on Thursday that she did not support his statements.

Min wrote on Twitter that she attended a dinner party that Wolff describes in detail, including a verbatim conversation between Bannon and Roger Ailes, the now-deceased former chairman of Fox News.

"Every word I've seen from the book about it is absolutely accurate," Min wrote.

In a telephone interview on Thursday, she added, "people sometimes don't like what he says, but I think one of the things that's unnerving about Michael is he's loyal only to the story". Of her own collaborations with Wolff, she added, "nobody ever disputed the facts that were included on a piece."

Raised in the New Jersey suburbs, the son of an advertising executive (his father) and a newspaper reporter (his mother), Wolff entered journalism early, as a copy boy for The New York Times. (He would later skewer The Times, along with other mainstream news organisations, as stolid and biased.) He has been a columnist and a media executive, writing a memoir about his time running a failed internet startup, and once trying to purchase New York magazine with partners including Harvey Weinstein.

His friends say he relishes a scrap. Min recalled him grinning broadly after a party, telling her, "everywhere I turned was someone who hated me".

Sometimes, the spotlight has found Wolff, who became a running character on gossip websites and the city's tabloids. His personal life caused a minor scandal after a late-life divorce, amid a relationship with a writer about 30 years his junior. (He and the writer, Victoria Floethe, now have a 2-year-old daughter.)

Wolff also became friendly with Trump, making a cameo in a pilot that never aired for a Trump-branded reality-TV project, "Trump Town Girls," which involved beauty contestants selling real estate. After the election, he secured Trump's trust, in part, by relentlessly criticising other reporters' coverage of the president-elect.

Soon, Wolff was spending days at the Hay-Adams hotel in Washington, a block from the White House, where he was routinely spotted walking into the West Wing. He dined with Trump aides at the nearby Bombay Club. His book, he writes in an author's note, is based on about 200 interviews, including at least one conversation with the president.

"Many of the accounts of what has happened in the Trump White House are in conflict with one another; many, in Trumpian fashion, are baldly untrue," Wolff writes. "Those conflicts, and that looseness with the truth, if not with reality itself, are an elemental thread of this book."

Graydon Carter, Wolff's former editor at Vanity Fair, wrote in an email that he was not surprised Wolff "would write an entertaining book".

"The mystery," Carter added, "is why the White House allowed him in the door."

New York Times