I read this book shortly after he wrote it. I was a junior engineer at a big company, and the final chapter (on humans being the weakest link in computer security) inspired me to run "crack" on the password (shadow) file of one of our networked Sun workstations. (I actually wrote some code to re-create the shadow file from the output of ypcat because we were running NIS.) Crack managed to obtain about 20% of the users passwords, including root. I wasn't an admin on that network, so I informed the admin and his reaction was that he did not care if I had admin on his network. (I ran a few others already.) One of the cracked user passwords struck me as funny so one day in the hallway I casually asked what that word meant (to the owner of the password). The terror-stricken user froze and asked me why I wanted to know. Instead of recognizing the issues associated with using a dictionary word for a password, he went and complained to my manager. I got called on the carpet for "hacking his windows account." (Apparently he used the same password everywhere.) Fortunately my boss had a good sense of humor and nothing came of it. This was before the company even had a computer security policy. A year or two later, doing what I did would become a fire-able offense.