Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Great Book for All Security Professionals

I have read quite a number of Cisco Press Titles and several books on Computer Security. Saadats's book is in the same class as some of the best I have read.As a practising Network engineer with more than six years of Enterprise wide network and System management, this is one book, I wish I had read much earlier.Its a great resource for every category of Personnel working with networks. The First Part gives you a good overview of the issues and the details become juicier with each passing chapter. No matter what level of expertise you have, you're bound to find some use for this book, and for the CCIE -Security folks out there (current and aspiring), this is surely one of the must haves, from a writer who knows what he's writing about.