i have that exact book. it was pretty good, but my only complaint was that it doesn't specify what exact tools are going to be on the exam. like i hadn't used netcat much so i was not used to it's switches, even though i've "played' with other piping program. luckily netcat is in the book and i figured it would be on the test so i knew i needed to look at it some. (great tool btw) but be wary of other programs and certain logs that they might ask you to review. especially about os identification. that one almost tripped me up.