The book, which is filled with royal revelations, sheds light on the theory that palace insiders floated about the prince's relationship with his wife.
Apparently, some senior officials even held talks about stripping Harry of his royal title after the couple's decision to step down from their roles as senior members of the royal family.
However, the book states that King Charles was not in favour of this because of his love for his son.
The author of the book, Robert Jobson, also reveals that some aides joked about Harry being a victim of Stockholm syndrome and blamed Meghan for the family's fallout.
The book claims that this perception could change if Harry continues to criticize the monarchy. In that case, King Charles might bow to increasing pressure, and Harry and Meghan could be demoted to "Mr and Mrs Mountbatten-Windsor of Montecito, California".
The book also chronicles new details about the strained relationships between the Sussexes and the royal family. The author claims that Charles is "deeply saddened by the widening gulf" between him and his youngest son and wishes he could see more of Harry's children. However, Harry's recent bombshell autobiography and TV interviews criticizing the family have hindered his chances of repairing the rift.
According to one senior aide, some blame Meghan for the fallout, but others feel that Harry has turned his back on everything he has known. The book also reveals that after the Queen's death, Prince Harry reportedly insisted that his wife accompany him to the Queen's Scottish bolthole at Balmoral Castle, but his father, King Charles, reportedly ignored his request.
The book is set to be released in July, and it has already generated a lot of buzz about the royal family.
