Prince Harry will blast William & moan he was forced to play second fiddle to older brother in explosive new book

PRINCE Harry’s book will take his war with brother William to a new level by telling all about their conflict.

Harry’s biography Spare — expected to reveal more than his Netflix series — complains about him playing second fiddle.

Prince Harry’s new book will blast the system that left him playing “spare” to his older brother and heir to the throne Prince William.

The Duke of Sussex, 38, will lift the lid on his row with the Prince of Wales, 40, and complain of the unfairness of playing second fiddle to him.

The explosive book — called Spare and published next week — is set to go further than his £80million Netflix docuseries and give a detailed blow-by-blow account of their falling out.

Prince William and his wife Kate, the Princess of Wales, have always maintained a dignified silence on the row and will respond to the latest allegations by committing themselves to their public duties.

William has barely spoken to his younger brother for three years.

Their father King Charles, 74 — who met crowds in Sandringham yesterday — is expected to avoid the worst of Harry’s anger when the book is published next Tuesday.

Harry has been warned that Charles’s wife, Queen Consort Camilla, 75, is his “red line”.

A source said: “At the heart of this book lies a sibling rivalry between little brother and big brother.

“It will reveal Harry’s bitterness and feelings of unfairness that by the nature of hierarchy and birthright that he always played second fiddle to older William.

“The falling out is to be covered in the book in detail and what aggravates is it’s not an outsider revealing these private moments — it’s Harry giving his one-sided account of family affairs.

“Harry and William were meant to stick together and support each other.

“Their mother Diana always warned them they must never fall out because they would need one another. It is very sad it’s reached this stage.”

Harry left senior royals in a “state of sadness” when he spoke to Netflix about private conversations at the Sandringham Summit.

He also accused William of “screaming and shouting”, refused to support claims he had not been bullied by his brother and alleged Charles told lies.

The book is set to delve deeper into his fury at William getting preferential treatment because he is higher up the line of succession.

It will also look at how the death of his mother Princess Diana, when he was just 12, affected him.

The book has been ghost-written by Pulitzer Prize-winning journalist JR Moehringer.

Royal biographer Ingrid Seward said: “He’s got a very good ghost who will write well about feelings, and I think it’s totally fair that Harry should talk about his mother, because everybody else in the world has and they’ve sort of taken her over.

“The publisher will know that Diana sells. And you don’t have to say too much because whatever he says is coming from him.”

Sources close to the King maintain “he loves his son very much” and the door “is always open” and there is an invitation to dinner whenever Harry, now based in ­California, is in the UK.

But a source told The Celeb Report: “Camilla is Charles’s red line. If Harry trashes her then Charles could pull the plug, and Harry knows that.

“Harry had a difficult relationship with Camilla, who had an affair with his father when he was still married to Diana.

“But attacking Camilla would not go down well among palace staff or his father, and Harry is aware.”

Harry is understood to have already recorded a TV interview about the book with ITV News at Ten’s Tom Bradby.

It is expected to air on Sunday — two days before the book is published.