You can view these books if you're outside of the states. How you do this is to view google books through a proxy server. This server fools google to think you're from the states.
To find one reliable proxy has so far been hopeless to me. However, by trying random proxy's at
http://proxy.org/ you will get lucky 1 out of 5 or so.
Its annoying having to do this, but I usually just download the PDF right away so I wont have to use it too often.