For developers with knowledge of HTML, this manual explains how to use XHTML and CSS (Cascading Style Sheets) to build websites that are accessible and meet current requirements. Via the update of a fictional site, Duckett demonstrates how to create websites that will work in different browsers, page presentation, and compliance with Section 508 accessibility guidelines developed by the US government and the World Wide Web Consortium. He describes the differences between HTML and XHTML; CSS style, positioning, properties, and layout; tables and forms; testing the website; and future technology. There is no bibliography. Duckett is a freelance developer and consultant in London.