Mayer’s book, Divide & Rule: Royal Women and Their Battles (out June 23), traces a line from Queen Elizabeth’s carefully kept image—"She found her look and maintained it for more than half a century"—to Diana, who “had turned out to be a bigger star than the system could handle.”
Queen Camilla’s steady, softened public persona is another focus: Mayer says she “found something and stuck with it,” acting as a constant support for King Charles as he continues treatment for cancer.