Friends, collaborators, and childhood rivals, Briton Hadden and Henry R. Luce were not yet twenty-five when they started Time, the first newsmagazine, at the outset of the Roaring Twenties. By age thirty, they were both millionaires, having laid the foundation for a media empire. But their partnership was explosive and their competition ferocious, fueled by envy as well as love. When Hadden died at the age of thirty-one, Luce began to meticulously bury the legacy of the giant he was never able to best.

In this groundbreaking, stylish, and passionate biography, Isaiah Wilner...