The book starts with a good overview chapter and it gives a feeling that there is a lot of interesting information provided and it got me excited. The first three chapters go through the main new features of ADO.NET by using basic terminology and simplified view to the things so that beginners are easily able to get the subject. Language used is clear and if you've ever read previous books of Alex Homer and David Sussman, you are probably very familiar with the style.
There's no doubt that absolutely the best part of this book is the information about the new XML features. These sections just rock! The reader is given great background discussion about things that have had impact on the evolution of XML generally, design of XML classes in .NET Framework v 1.0 and again to the design of XML classes in .NET Framework v 2.0. Reader gets solid understanding what have been the driving requirements and what the results are and how they are of benefit.
What's so special is the obvious insight and great expressing capabilities of the author that I haven’t seen such in XML books before! The XML books I’ve read have usually been either very boring by making repetition of the documentation or written with so incomprehensible logic that it makes it extremely hard or impossible to read but this book really is an exception. The text is very rich and informative but still brief which makes it a pleasure to read. I just hope I can read complete books about XML which are as good as this is.