It’s not an easy feat to stay on the New York Times Bestsellers List for four-and-a-half years straight, but Tim Ferriss is used to pushing limits.In 2007, Ferriss transformed the world of book marketing with a grassroots campaign that gave his first book, The 4-Hour Work Week, mass appeal — all while detailing his adventures as a champion kickboxer, world record holder, entrepreneur, and more.

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