Mark creates humor for clients like Coca Cola, Fidelity Investments, Google, McDonalds, Ralph Lauren and Time Warner. He's also a genre-crossing book illustrator. He’s illustrated 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 under contract for King Features Syndicate and Tribune Media, and cartoons for magazines like The Atlantic, Forbes, Time, and The Wall Street Journal.