In a nutshell, Creating Cool Web Sites with HTML, XHTML, and CSS is an introduction to
HTML, XHTML, and Cascading Style Sheets. HTML is the HyperText Markup Language, and
it’s the language that enables you to create and publish your own multimedia documents on
the World Wide Web. Millions of users on the Internet and online services such as America
Online, Earthlink, and the Microsoft Network are spending hours each day exploring the world
of the Web from within their Web browser, be it Internet Explorer, Netscape Navigator, or any of
a variety of other programs. XHTML is the modern “proper” version of HTML and is the future
of the markup language. Cascading Style Sheets are also part of that future, and it’s a rare
modern Web site that doesn’t use at least some element of CSS in its design and layout.