Are you reading a book about hacking computer networks?! What could make anyone write a detailed book on such a controversial and potentially dangerous topic? Good question. It can be asked about many other works on the topic of computer protection, standing next to our work on the shelf of a bookstore. Books about vicious hackers and their craft are not new. Many of them are written to quickly draw money from those who were stunned by the latest sensation splashed out by the media.