Veteran fashion journalist Elizabeth Holmes expands her popular Instagram Stories series, So Many Thoughts,'' into a nuanced look at the style, branding, and positioning of the four most influential contemporary British Royals: Queen Elizabeth II; Diana, Princess of Wales; Catherine, Duchess of Cambridge; and Meghan, Duchess of Sussex. Today, the fashion choices of Kate Middleton and Meghan Markle are frequently headline news. More than just wearing beautiful clothes - and they are really beautiful - these women dress with purpose. Their choices of color, silhouettes, and brands send a message about their values, interests, and place within the royal family. But to fully understand what Kate and Meghan are wearing, one must look to two style icons that came before them: Queen Elizabeth II and Diana, Princess of Wales. For nearly seven decades, the Queen has made her wardrobe work for her, settling into a uniform of colorful coats and hats that make her instantly recognizable. Diana unlocked royal fashion's ability to shock and awe, earning a spot on the front page and rejuvenating interest in the crown. Kate introduced a welcome relatability with her accessible choices, unleashing a shopping frenzy in the process. Meghan, a biracial American and a working actor, brought a new audience and aesthetic, as well as her social media savvy to the mix. With one section devoted to each woman, HRH pairs hundreds of gorgeous photographs with extensive research to paint a vivid portrait of each woman's fashion preferences, messaging, and evolution.