I was wondering if anyone has read the new Fourth Edtion and your impression compared to earlier editions?

I ask because I read the 2nd edtion and thought it was very good educational and reference book. The new addition covers wireless plus some other newer stuff but I would like to know what anyone here thought?

My other half is going to get it for my b-day but she's holding out since she wants her graduation gift early. Tit for tat thing. I'm stubborn on giving in early but I wouldn't mind so much if I knew it had alot of good and newer stuff in it.

Opinions on the book(s) only ?