Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Obviously trying to cash in on Red Hat's dominance

Red Hat is synonymous to Linux for many people, and this book is obviously trying to cash in on that. The editing of this book leaves much to be desired - there are some really terrible errors throughout. I am usually partial to books that have CDs with them, but in this case it doesn't add anything. The tools on the CD are freely downloadable from the internet, and are being updated constantly. The versions on the CD are very old, so you need to download new versions anyway.Overall, for my money, I'd buy the oreilly security book or the hacking linux exposed one.