Kevin Mitnik tells his own story. How he became one of the earliest (and most famous) computer hackers, evaded the FBI, and eventually found a way to use his knowledge to educate. The author is clearly wildly egotistical and that's sometimes annoying while reading, but it's still a very interesting picture of hacking. In particular it makes very clear how irrelevant the technology is compared to the vulnerability of "social engineering", still a very relevant warning.