David Karlins is the author of more than a dozen books on Web design that have sold over a million copies worldwide, including HTML5 for CSS3 for Dummies. His articles have appeared in publications ranging from Macworld to Business Week. He has taught Web, graphic, and interactive design at San Francisco State University's Multimedia Studies Program and the University of California, Berkeley, Extension division. His Web design and consulting clients have ranged from Hewlett Packard to the Himalayan Fair.