Prince William has barely spoken to his brother Harry since news of his tell-all memoir emerged, it has been reported.
The 416-page book called Spare - a nod to the phrase "the heir and the spare", which was used to describe the two brothers - will be published on January 10.
Prince Harry has vowed the book will be a "truthful and wholly accurate" account of his life - with the announcement of the novel reportedly sending a "tsunami of fear" through royal circles.
Publishers Penguin Random House have described the memoir as an “honest and captivating personal portrait” of his “lifetime in the public eye from childhood to the present day”.
William is said to have hardly spoken to Harry since news of the book came to light, sources told The Sun.
Members of the Royal Family are also reportedly waiting on "tenterhooks" to read the bombshell memoir.
The once-close brothers are said to have been locked in a feud for several years, with Harry biographer Omid Scobie claiming tensions first flared after William advised him to take things slow with new girlfriend Meghan Markle.
Spare, which has a striking cover image of Harry, was set to come out this autumn but the date was pushed back as a mark of respect following the death of the Queen.
Her death brought Charles, William and Harry together once again as they mourned and walked behind her coffin in several processions - and attended her funeral with their wives.
But a source previously told The Sun on Sunday: "Harry has thrown a spanner in the works as he is desperate to get [the memoir] refined in the light of the Queen’s death, her funeral and his father Charles taking the throne.
"There may be things which might not look so good if they come out so soon after the Queen’s death and his dad becoming King.
"He wants sections changed. It’s not a total rewrite by any means. He desperately wants to make changes. But it might be too late."
It will cost £28 for a hardback copy, with the audio book - voiced by Harry himself - priced at £20, but is already being offered at half the cost by Waterstones.
Penguin Random House said: “For Harry, this is his story at last.
“With its raw, unflinching honesty, Spare is a landmark publication full of insight, revelation, self-examination and hard-won wisdom about the eternal power of love over grief."
The publisher also said that Harry had donated £1.3m of his £18.4m advance to his children’s charity Sentebale.
He also gave £300,000 to WellChild, a charity for disabled children of which he is patron.
