I don't usually take the time to come back and comment on a book unless it's very bad. In this case the book is way better than I've come to expect from most NT books. There were so many extra topics in the book that I don't think I've seen elsewhere. Important registry setting are listed and explained but not ALL of them (with no explaination) just what is important. I liked the IP Management section and DNS overview. The capacity planning section that somebody else here mentioned was excellent and the tuning and troubleshooting chapter had a great section on problem resolution. It covers a very wide range of topics relating to NT and networking and does it very well.-Tom