The author has written this book to instill in web interface developers the need for a constant focus on users. He shows that designing usable web sites requires employing a web-specialized methodology of designing for context. He brings to this discussion his unique blend of research in both HCI and psychology, as well as his practical experience building usable web sites for companies such as IBM, NCR, Schlumberger, Siemens, Southern Bell, Web-MD, and Westinghouse.