To quote the author, the book contains "Lots of information and no quick fixes." And the book contains exactly that! Bravo!
The book is concise, relevant, and very well written. It provides excellent information without getting bogged down in minute theory or implementation details.
The book provides a solid but practical theoretical background to intrusion detection. It contains relevant real world examples. It does not contain a bunch of dated "quick fixes" for each type of intrusion problem. (If that is what you want, you need BUGTRAQ or CERT, not a book. By the time an intrusion schema fix hits the press, its solution is out of date!)
The book is full of good ideas that are practical and often readily implementable. If you have a hacker/cracker problem, I highly recommend you read this book! It will give you good insight into the types of weaknesses that are exploitable and the types of defenses that are appropriate. There is even a chapter on setting traps to catch hackers.
(Hackers and Crackers: Please do not read this book!)
Jon R. Kibler, Systems Architect, Advanced Systems Engineering Technology Inc.