I am resonably computer literate and am qualified in Java programming at degree level. Ok, I'm no genius but neither am I an idiot. This book told me NOTHING about legal hacking. It seems to be full of references for those who already have a grasp of the subject. The usual format of Dummies books (start from the basics and build up) is completely absent. If advertised as a reference book for the amateur hacker it would be fine but as a teaching manual (what Dummies books are famed for) it FAILS ABYSMALLY! Very very disapointed. It will now gather dust on my shelf. Complete waste of money.
This book has quite a lot of useful info, but also a lot of jargon. You really need more basic info on the workings of web sites before fully understanding this book. However about 3/4 of the book is about telling you to get permission from the web site or network owner before testing (hacking) their facilities, which I didn't need, and to make it worse it's repeated over and over again; so as far as I am concerned the book could have been about 1/4 of the thickness. It would have been more useful to explain more about basic web site workings; although that probably is the content of 1/4 of another book?