It's taken me a while to work through this book, but it's turning out to be well worth the purchase price. I've been in high tech for 32 years and in networking for half of that and this book is teaching me lots of new things.
This book is required reading for at least one of my information security management courses at my college. I haven't even read half of it, but I can say, with confidence, that it's already proven more useful than anything I learned in my five years of doing university-level computer science. The only thing it does not do is teach you how to hack a computer, at least not in the sense of what being a hacker means. It would definitely help you on your way of becoming a script kiddie, though!