It may be still up-to-date when it comes to hackers mentality, but it's for sure very old when it comes to technical part. I would treat it as some kind of historical book for people interested in hackers/crackers/geeks "subculture" if I may call it like that, and how it was in the beginning.
Historical only for limited number of hackers. "(Highlights Reel") No technical info - only blurb names of techniques and tools. Somewhat repetitious wording. Almost boring except for the overly eager method of detailing personalities and skills development.