New light is being shed into how King Charles III reportedly leads his staff. In Valentine Low’s "Courtiers: The Hidden Power Behind the Crown," insiders close to the monarch shared that Charles has a "fierce temper and a ferocious work ethic." "Things would frustrate him, especially the media," an insider told Low, which The Times published from the book. King Charles III was deemed "very demanding of himself" and expected the same from his staff, according to new book.