Maybe if it was cutting-edge stuff that you needed to find, then I would say you're correct. But for a intro book on hacking, 2.5 years old is not that bad at all. And for approx. $13 - 16 on Amazon
, you can't go wrong.
I would also recommend Ed's book, Counter Hack Reloaded. It is also a little older, but Ed has a way of taking you from 0 - 60 in under 4 seconds without the effects of inertia pushing your face back in your chair. He even explains the basics of Linux and Windows before blowing your mind with multiple real-world examples. Highly recommended. You can see a sample chapter right here on EH-Net
. It's a little more expensive, but it's well worth it.
If you get through all of the book recommendations above plus another on more advanced programming, then you'll probably be ready to jump into something like Hacking: The Art of Exploitation (See Ryan Linn's review)
All this and some practice in your own lab, and in about a year, you'll be well on your way to setting a solid foundation.
Hope that helps,