Prince Harry was warned against writing a second memoir as that would put the Royal Family through “great stress”, according to a royal commentator.

Last week royal author Robert Hardman suggested there may be a second part to the Duke of Sussex’s Spare during an appearance at the Hay Festival.

According to the Independent, Mr Hardman said the book only features four or five pages about Harry and Meghan Markle’s wedding, adding: “Now, as an author, that says to me one thing and one thing only: part two might be on its way.”

However, US-based journalist Lee Cohen warned against any such moves by the duke and said it would be “extremely ill-advised” for him to pen a second book as the royals are currently battling a series of illnesses.

He told GBN America: “A second memoir is conceivable given the scant coverage in the first book of his wedding to Meghan Markle.

“This raises significant concerns. It would be extremely ill-advised for Harry to pen a second memoir.

“This is most critical for the new stress it would induce for his family, who are already ailing with serious health crises.”

Mr Cohen added that another “hateful book” would further “tank Harry’s already languishing public esteem”.

He explained: “Harry’s initial memoir already delved far too deeply into private family matters, making any further trust by his family impossible.”

In Spare, Harry made a series of explosive claims about the Royal Family.

The duke spoke about life within the Firm and he attacked several royals, including King Charles, Prince William and Princess Kate.

One of the duke’s most striking claims was that he was physically attacked by his brother during an altercation in 2019 over Meghan Markle.