As in-depth as you will get on DNS for Windows 2003. A recent reviewer stated that it's much of the same. Well, much of it really is; and if you''ve been working with DNS for as long as many of us, nothing about its operations should be new to you. The most significant "tweaks" in DNS in the past few years have been done by Microsoft, to support their AD/200x line - those features are detailed quite specifically in this book (it's what this is all about anyway). And with AD continually evolving, chapters such as Managing DNS Programmatically (with WMI completely in mind) should be of utmost importance for the practicing MS administrator (that is, if you've really read the book!)