I have several Windows NT security related books on my bookshelf. I find most of these lacking in one respect or another; that is why I have several of them. A friend introduced me to NT 4 Network Security. I borrowed her copy to read over the weekend and was so impressed I ordered my own copy before the weekend was out. The book is not only thorough and detailed, but it is fun to read. The authors explained a lot of network security terms that other books did not. They set aside important points in text boxes called "Reality check" and "Policies". They shared a tremendous amount of experience from not only the network administrator's perspective, but also the hacker's perspective. The real-world experiences alone made the book worth twice its price. After my first weekend reading this book, I came away with a 'hitlist' of over 20 items to check and secure on my own network. Even if you have previously read another networking or Windows NT security book, this book will been enlightening and entertaining. I'm glad these guys are on our side.