Prince Harry says he has enough material to write another memoir and chose not to publish certain details because he feared his father and brother would never forgive him if they were made public.
In an interview with The Daily Telegraph, the Duke of Sussex also said Spare’s initial transcript was twice as long as the final version and he struggled to work out what to cut.
Much of the details that were eventually deleted, he added, related to both his father and his brother.
“The first draft was different,” he told interviewer Bryony Gordon. “It was 800 pages, and now it’s 400 pages. It could have been two books, let’s put it that way. And the hardest part was getting things out.
He added: “There are things that have happened, especially between me and my brother, and to some extent between me and my father, that I just don’t want the world to know. Because I don’t don’t think they would ever forgive me.
Spare went on sale in the UK on Tuesday, but had already had a strong following after copies accidentally went on sale early in Spain.
The Guardian was first to reveal details of the memoir, including the allegation that Prince William attacked Harry following a tense discussion about Meghan, Duchess of Sussex.
Kensington Palace and Buckingham Palace said they would not comment on the contents of the book.
Prince Harry also talks about what he claims is a lack of support for him and Meghan.
The news of excess equipment is likely to cause further consternation for the royal family.
In the interview, Harry said he knew he would “be trashed” for including anything about his family, but couldn’t have written the memoirs without including them.
He also criticized the press and alleged that the media had “a ton of dirt on my family, I know they have, and they’re sweeping it under the rug for juicy stories about someone else”.
The Duke reiterated that he was not trying to destroy the monarchy, but rather to help reform it.
Referring to Prince William’s children – George, nine, Charlotte, seven and Louis, four – Prince Harry said at least one of his brother’s children would be a “spare part” and that the ” hurt” and “worried him”.
“It’s not about trying to bring down the monarchy – it’s about trying to save them from themselves,” he added. “I know I will be crucified by many people who say this.”
He suggested that in time the Royal Family might thank him for speaking so openly about his trauma.
Meanwhile, he admitted trying to change ‘an institution’ and the media landscape was ‘no small task’ but that he was taking ‘long-term strategic thinking’ to see through this ‘enormous’ challenge.