According to a royal insider, Prince Harry’s book will “focus heavily” on his mother’s death.

Sources revealed to Royal Author Angela Levin that the Duke’s book will primarily concentrate on the “terrible tragedy” he experienced as a kid.

“I’ve been told by a well-informed source that Harry’s memoir will focus heavily on the death of his mother Princess Diana, and who he blames,” she said on Twitter.

‘It was a terrible tragedy, but sad the man can’t move on.’

Prince Harry has talked openly about how his mother’s death affected his life over the years, notably at a speech commemorating her death on the tenth anniversary of her death, in which he hailed her as “our guardian, friend and protector.”

“She never once allowed her unfaltering love for us to go unspoken or undemonstrated. Behind the media glare, to us, two children, she was quite simply the best mother in the world,” he added.

Princess Diana died in a vehicle accident in Paris in August 1997, while being pursued by photographers.

The announcement of Harry’s book has sent shockwaves through the Palace, and the Royals are bracing for months of anxiety as they wait to see what bombshell allegations he will make.

After the Lord Dyson investigation claimed that former BBC reporter Martin Bashir used deceptive methods to obtain access for his Panorama interview with Princess Diana in 1995, Harry released a statement in May.

“The ripple effect of culture of exploitation and unethical practices ultimately took her life.”

“To those who have taken some form of accountability, thank you for owning it.

“That is the first step towards justice and truth.

“Yet what deeply concerns me is that practices like these — and even worse — are still widespread today. Then, and now, it’s bigger than one outlet, one network, or one publication.

“Our mother lost her life because of this, and nothing has changed.”

Meanwhile, the Royals and the general public can expect the Duke to elaborate on all of his “truth bombs” when he writes his life narrative, according to one expert.

Ms Levin, speaking to GOOD MORNING BRITAIN yesterday, said: “If it’s going to be intimate, as he says, I fear he risks looking like a traitor to the Royal Family.

“I think he is going to smash again. I don’t know why. Does he want to destroy his family?

“Does he feel so revengeful that he has to take yet another knock after Oprah and Finding Freedom?

“I don’t quite get it, why he doesn’t want to move on and enjoy his life.”

“Why is he so negative about his past? He can’t leave it alone. He’s like a a cat, a dog, tearing at something to destroy it.”

The book, which will be published by Penguin Random House, will be written “not as the prince” he once was, but as the man he has “become,” according to the Duke.

Prince Harry has said that he is working on an “intimate and heartfelt memoir.” The book will “cover his lifetime in the public eye from childhood to the present day, including his dedication to service, the military duty that twice took him to the frontlines of Afghanistan and the joy he has found in being a husband and father,” according to a statement posted on Archewell.com.

The Duke of Sussex said his £14.5 million  advance on the book, which to be published by Random House, will be given to charity. It will be released in late 2022.

The book has been called “wholly truthful”