King Charles Allegedly Grabbed His Valet, Smashed A Window During Temper Tantrums: Book

King Charles easily loses his temper, a new book claims.

Christopher Andersen spoke with several staffers who worked with the new British monarch for his new book, "The King: The Life of Charles III," which will be out next week. According to staffers who talked to the author, His Majesty had several temper tantrums.

King Charles' former valet, Ken Stronach, assigned to handwash his underwear and tuck him into bed with his favorite teddy bear, shared an incident when His Majesty allegedly grabbed him. The incident reportedly happened when King Charles was staying at a posh friend's villa in the South of France and lost one of his cufflinks down a bathroom sink.

"Flying into a blind rage, he pulled the sink off the wall, then smashed it, looking for the cufflink," Andersen wrote, Page Six reported. "Unable to find the missing jewelry, a wild-eyed Prince of Wales spun around and grabbed his valet by the throat. Stronach broke free, darted out a side door — and into a linen closet. Terrified, he huddled there for thirty minutes before he could hear Charles leave the bathroom."

The then-prince's temper tantrums reportedly extended to his tight social circle. There was a time he allegedly broke a window because he wanted some fresh air.

"Once, while a guest at a friend's country home, Charles wanted some fresh air," Andersen claimed in his tome. "Unable to open the window, he picked up a chair and smashed it open. Not satisfied with the results, he smashed another."

"You have to understand. The prince is accustomed to getting what he wants. And he wanted some fresh air," Stronach noted.

Meanwhile, a Highgrove staffer shared with Andersen how King Charles would allegedly bark orders through a green megaphone if he was not happy with the landscapers' work

"For someone who said he was bullied as a child, Prince Charles clearly enjoyed bullying us," the staffer told the "Brothers and Wives" author. "He could be pleasant and courteous, but just as much of the time, he was moody and mean. He didn't think twice about shouting insults at you if you put a foot wrong."

In the same book, Andersen claimed that King Charles assigned his trusted valet, Michael Fawcett, to look after his childhood teddy bear when he was in his 40s. When the toy needed mending, they would call his former nanny, Mabel Anderson, to repair it.

"The King: The Life of Charles III" will hit shelves on Nov. 8.