Very good nuts and bolts guide to Active Directory. I've looked at a few other books on the topic and this is the best so far. The book takes a very logical approach toward describing all the complex details behind Active Directory. And as a bonus there are a bunch of chapters on scripting. The sample scripts were helpful. Even though AD is a very complicated beast, I think the authors did a good job in making it understandable. If you've never done anything with Windows before and want a very high-level introductory guide to AD, this book will probably have too many details for you. If you have even a little experience with NT4 or AD, then this book is a great reference!