Kate Middleton was among the royals harshly attacked in the new book "Endgame," and a royal expert felt that the words were from her estranged sister-in-law, Meghan Markle.

British journalist and investigative reporter Tom Bower joined British journalist and broadcaster Camilla Tominey on GB News following the release of Omid Scobie's new book. They discussed the publication and how it attacked the royals, especially the Princess of Wales and King Charles.

"The point about the current book is this: that Omid Scobie clearly has nothing new to say. All he got [are] silly stories like King Charles irons his shoelaces," Bower said. "But worse than that, I do find his attack on Kate really gratuitous because that is very much Meghan speaking."

Tominey pointed out how the Duchess of Cornwall was depicted as a Stepford wife who didn't have much use. The "Revenge" author disagreed with Scobie's picture of Prince William's wife and acknowledged her contribution to the royal family.

"She's a wonderful woman. She's doing a terrific job," Bower said of Middleton.

In the book, Scobie claimed that Middleton was too terrified to do anything other than grinning in photo ops. He also seemingly criticized the Duchess of Cambridge for allegedly prioritizing her personal style and inoffensive causes to "glide under the radar" and even called the future queen a "part-time working royal."

In one interview ahead of the release of his book, Scobie claimed that Middleton received too much credit for the little things she does.

"In the coverage of Kate, we infantilize her massively, so the bar is always lower. The small achievements that we've seen from the Princess of Wales wouldn't perhaps be noticed if it was from another member of the royal family, but with Kate, it's like 'wow!'" Scobie told The Sunday Times.

During the chat, Tominey read comments about the book and how Scobie seemingly praised Prince Harry and Markle while attacking the royals. One comment mentioned how the "Finding Freedom" author failed to hold the Sussexes accountable for anything, to which Tominey agreed.

"The point is because he is their spokesman, that's why we know," Bower said. Tominey noted that it was "unofficial." However, the former BBC journalist argued that it was "well quite official" based on his statement in "Finding Freedom," which was allegedly "untrue" and "inaccurate." Bower also emphasized how Scobie praised the Sussexes before sharing the significance of the book to the Sussexes and the royal family's relationship.

"This is the really important part about this book -- it shows the Sussexes are continuing their war," Bower claimed. "They are all the time looking for a way to needle and to discomfort and to disable the royal family because it's in their financial and professional interest, and that is really where the sin of this book is -- that actually the attack on the royal family is Meghan and Harry talking in their anger."

Bower claimed that the Sussexes can't make headway with their careers in the U.S.A. "other than by rubbishing the royal family, who tried their hardest to make them feel at home." He added that what Scobie, Prince Harry and Markle did were "shameful."

"Endgame" hit the shelves Tuesday.