Schwartz's little book is a good primer on computer and network security from the point of view of the hacker -- it presents itself as a beginner's guide to joining the "industry" but in fact serves as a good guide to personal common sense when it comes to computers and the Internet.
There were a fair number of typos and grammatical errors throughout the book, which can be common in self-published books like these, but I actually liked the layout and easy-to-read chapters. He doesn't go on too long about overly technical issues, provides a lot of tips and tricks that apply to hackers and regular users alike. They may be outdated very quickly, but even if the only take away for readers is to use anti-virus software, I think the book did its job.