King Charles III can't handle his son's fiery temper, according to a new book. In a new interview with Page Six out on Friday, Christopher Andersen talked about his new book, Kate! The Courage, Grace, and Power of the Woman Who Will be Queen, and revealed that Charles isn't the only one who's known to have a bit of a short fuse. The author confessed to the outlet Prince William also has a temper: "William is capable of great bellowing tantrums." Related: Inside William & Kate's Marriage As They Celebrate 15th Anniversary! According to the writer, William is "kind and considerate to a fault.