She told OK!: “I don’t think he will be particularly upset about this. He made an awful lot of money from the original contract and, whatever he says, he is already a very wealthy man.”

The expert claimed that Harry’s decision to release a memoir had more to do with the fact the duke wanted to tell his story, rather than boost his income.

She explained: “I don’t think his decision to write Spare was ever a predominantly financial decision.

“I think he really wanted the world to know how he felt about his life, his family and the way he felt the Palace treated him.”

Ms Bond added that Harry’s “conscious decision” to not add any new material in the paperback edition could forge a new path in his relationship with the royals.

She said: “I think he has made a conscious decision to move on from all the bitterness and had no interest in dredging up more stories for the paperback.

“That has to be a good decision for everyone involved.”