I didn't find the first two chapters particularly useful, but from the third onwards it was simply enlightening. Reading chapter 3 I finally understood what Cross Site Scripting attacks were, and made clear how important it is to know stuff (HTTP in particular) in if you are serious about security (and about system administration in general).

The chapter about configuring Apache in Jail was great, and so it was the chapter about mod_rewrite . In general, the whole book was fantastic, and explained so much about security and Apache. In general, I didn't think there was so much to know about security and Apache, until reading this book that showed them to me so clearly.

I would have liked more depth in some of the chapters (like "Logging", that is very interesting but probably not detailed enough), but overall this book was a great buy.

A colleague of mine is a very experienced system administrator and said that you would find out about all that stuff slowly, working and looking up stuff quite a lot. I found that this book put my on a different level, closer to a senior system administrator.

Good buy!