In the tradition of The Barbizon and The Girls of Atomic City, fashion historian and journalist Nancy MacDonell chronicles the untold story of how the Nazi invasion of France gave rise to the American fashion industry.

Calvin Klein. Ralph Lauren. Donna Karan. Halston. Marc Jacobs. Tom Ford. Michael Kors. Tory Burch. Today, American designers are some of the biggest names in fashion, yet before World War II, they almost always worked anonymously. The industry, then centered on Seventh Avenue in Manhattan, had always looked overseas for "inspiration"—a polite phrase for what was often blatant copying—because style, as all the world knew, came from Paris.

But when the Nazis invaded France in 1940, the capital of fashion was cut off from the rest of the world. The story of the chaos and tragedy that followed has been told many times—but how it directly affected American fashion is largely unknown.

Defying the naysayers, New York-based designers, retailers, editors, and photographers met the moment, turning out clothes that were perfectly suited to the American way of life: sophisticated, modern, comfortable, and affordable. By the end of the war, "the American Look" had been firmly established as a fresh, easy elegance that combined function with style. But none of it would have happened without the influence and ingenuity of a small group of women who have largely been lost to history.

Empresses of Seventh Avenue will tell the story of how these extraordinary women put American fashion on the world stage and created the template for modern style—and how the nearly $500 billion American fashion industry, the largest in the world, could not have accrued its power and wealth without their farsightedness and determination.