This book was written when Windows 2000 was still in beta, and is specifically geared towards ADSI 2.0 - not ADSI 2.5, which is what is out and in use today. Given that, this book makes reference to, and shows examples for many commands no longer supported by Microsoft and no longer in use on Windows 2000 (as well as never having been utilized in NT4). The book is a little light, being only about 300 pages, and could use more example code, and fewer background / history lessons. Unlike typical reference books, this book is presented in much more of a mini guide-to-lots-of-stuff, with the true reference-style documentation being primarily in the appendix.

Although I have used this book as a learning tool, it remains a secondary book to me, and I can see it sitting on the shelf neglected as there are better true reference books out there.