Ryan Holiday dropped out of college at the age of 19 to apprentice under author Robert Greene. He went on to advise many bestselling authors and multiplatinum musicians, and served as director of marketing at American Apparel. He is the author of several books including Trust Me I'm Lying, Ego Is the Enemy, The Daily Stoic: 366 Meditations on Wisdom, Perseverance, and the Art of Living (co-written with Stephan Hanselman), and Perennial Seller: The Art of Making and Marketing Work That Lasts.