In Inventing the It Girl: How Elinor Glyn Created the Modern Celebrity , historian Hilary A. Hallett argues that Glyn was a pioneer of "lifestyle branding" who intentionally constructed the "It" phenomenon to redefine female desire and public persona in early 20th-century Hollywood. The book highlights Glyn's transition from British novelist to a influential Hollywood arbiter who taught the industry how to market "sex appeal" by cultivating a blend of sexual autonomy and glamour.