Ryan Holiday is a bestselling author and media strategist. After dropping out of college at nineteen to apprentice under Robert Greene, author of The 48 Laws of Power, he went on to become the director of marketing for American Apparel. His creative agency, Brass Check, has advised clients including Google, Neil Strauss, Tony Robbins and Tim Ferriss. He is the author of six books, including The Obstacle Is the Way, Ego Is the Enemy, The Daily Stoic and Perennial Seller.