Mark writes and draws humor for corporate clients, including Coca Cola, Fidelity Investments, Google, McDonalds, Ralph Lauren and Time Warner. He's also a genre-crossing humorist. He's created written and drawn humor for books published by MacMillan, Penguin Random House, Pearson, Harvard Business Review Press, Prentice Hall, McGraw-Hill, and Wiley. He has created humor and illustrations for over 40 books, from children's books to nonfiction, including several New York Times bestsellers. Previously, he created comic strips for King Features Syndicate and Tribune Media, and cartoons for magazines like The Atlantic, Forbes, Time, and The Wall Street Journal.