What is the im's grandfathers deathbed advice?

It's still available on Amazon:

Amazon.com/Invisible-Man-Novel-Ralph-Ellison/dp/0375507914/ref=pd_bbs_sr_1/103-1896320-0976614?ie=UTF8&s=books&qid=1184170873&sr=8-1">http://www.Amazon.com/Invisible-Man-Novel-Ralph-Ellison/dp/0375507914/ref=pd_bbs_sr_1/103-1896320-0976614?ie=UTF8&s=books&qid=1184170873&sr=8-1

And given its place in our culture, I would expect you to be able to walk into any major bookstore (such as Barnes & Noble or Borders) and pick up a copy.