Timothy Ferriss is an American entrepreneur, investor, author, podcaster, and lifestyle guru. He is known for his 4-Hour self-help book series—including The 4-Hour Work Week, The 4-Hour Body, and The 4-Hour Chef—that focus on lifestyle optimizations.

Ferriss is also a start-up advisor specializing in positioning, PR, and marketing, having worked with companies like Uber and Evernote. When not damaging his body with abusive sports, he enjoys chocolate, bear claws, and Japanese animation.