I love the "In Easy Steps" series. The books are great introductions and make great reference manuals when you finish with them. With all of the coming changes for web pages and other applications that will utilize XML, I purchased the book. The book does a good job of explaining why XML is more flexible than HTML and its creation of custom tags, but I couldn't figure out what to do with XML once I finished the book. I understood the rules and implementation into a web page but no explanation was evident for other application use. (Office 2007 and SWF files) Basically, I couldn't justify changing all of my web pages when XHTML and CSS get the job done. Like I said earlier, I plan on using this book as a reference.