XML Visual QuickStart Guide by Kevin Howard Goldberg has been named #2 of the Best XML Books by About.com's Web Design/HTML guide, Jennifer Kyrnin.
Here is an excerpt of her review:
If you're looking for a good introduction to XML, this is a great book. It provides all a beginner needs to start understanding XML without getting overwhelmed. You should have some understanding of HTML coding practices before you start reading this book, but even if all you've ever used is a WYSIWYG editor you'll get something out of it.
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