Dan Roam is the author of The Back of the Napkin, which was Fast Company's Best Business Book of the Year and BusinessWeek's Innovation and Design Book of the Year, and more recently Blah Blah Blah. He is the founder of Digital Roam, Inc., a management consulting company. His clients have included Microsoft, Google, Wal-Mart, Boeing, Lucasfilm, The Gap, and the White House Office of Communications. His health-care analysis was named BusinessWeek's Best Presentation of 2009. He lives in San Francisco.