This edition updates the book that shaped and evolved the landscape of interaction design. It takes the worldwide shift to smartphones and tablets into account. New information includes discussions on mobile apps, touch interfaces, screen size considerations, and more. The interaction design profession is blooming with the success of design-intensive companies, priming customers to expect "design" as a critical ingredient of marketplace success. Consumers have little tolerance for websites, apps, and devices that don't live up to their expectations, and the responding shift in business philosophy has become widespread. This book brought interaction design out of the research labs and into the everyday lexicon, and continues to lead the way with ideas and methods relevant to today's design practitioners and developers. --