A few days before the official publication of Harry's memoir, the renegade prince's explosive descriptions are already causing a great deal of excitement.

Royal expert Michael Cole called them the "most sensational and destructive royal revelations" in almost 30 years on Sky News on Saturday.

Prince Charles biographer Jonathan Dimbleby compares them to British BBC Radio 4 with the confessions of a "B celebrity".

The autobiography "Spare" accidentally hit the Spanish bookstores early on Thursday.

Since then, details have come to the public that have it all - an overview.

The Best Man Show

Prince Harry has reportedly accused his brother Prince William of not actually being best man at his wedding to Kate in 2011.

He was forced to play along with the "outrageous lie" and was only supposed to be used for the big show to spare his brother's two best friends public interest in their person, quotes the "Mirror" Harry.

The traditional best man speech at the wedding reception would have been Williams' friends James Meade and Thomas van Straubenzee.

According to Harry, just hours before his wedding, Prince William was said to have been "tipy" and smelled of alcohol.

The escalation with William

One bad word too many, a shove from William - and Prince Harry is on the ground, injured by shards of a broken dog bowl.

At least that's how the 38-year-old describes what is probably the most violent dispute between him and his brother known to date.

"Everything happened so fast.

Very fast.

He grabbed my collar, tore my chain and threw me to the ground," the British Guardian quoted Harry's description of the dispute more than three years ago.

Prince William (40) is said to have previously described Harry's wife Meghan as "difficult" and "rude", after which Harry accused his brother of having adopted the narrative of the British tabloids.

Harry as "reserve", William as "nemesis"

The rivalry with the big brother is already reflected in the title of the book: "Spare" (in German: "Reserve").

That's what his father is said to have said about him after he was born, Harry claims, according to the reports.

The brothers, who were once considered inseparable and affectionately known as "Willy" and "Harold", have long faced each other in bitter competition.

Harry refers to William in the book as a "beloved brother" but also as a "nemesis".

The fight about the beard

Before Harry and Meghan's wedding, the two brothers were even said to have argued about Harry's facial hair.

"At some point he actually ordered me - as heir to the throne addressing the reserve - to shave me," writes Prince Harry, according to a report by the "Mirror" about his brother.

It is said that even the Queen gave him her blessing to marry with a beard.

William was concerned that Harry should not enjoy something he himself had been denied, the prince claims in "Spare".

The fear of the "evil mother-in-law" Camilla

Camilla was known to him early on as his father's "other woman", writes Harry.

After his mother's death, he feared she might turn out to be a "wicked stepmother," according to media reports.

Because she made Charles happy, he welcomed her into the family.

But the brothers' alleged pleas that their father not marry again went unheeded: Charles and Camilla married in 2005. She is now the king's consort.

Harry accuses her, like other royals, of secretly giving information to the press.