In sum, the authors have managed to expand the scope of a classic text and increase its utility by focusing on core issues, and using the resources of the Internet itself as pointers to more current information. In this fuzzy age of transition from paper to digital text, such may be all we can ask of authors. 1997 by Patrick Flannery. The next keeper is the second edition of Garfinkel and Spafford's 1991 security book. It has grown immensely, from barely over 500 pages to nearly a thousand, but most of it is both worthwhile and important.
Security is a really important topic.
Your users don't understand it. This is a fine book on a difficult topic.