I've got some sticky backed felt circles of various sizes I bought to put on the bottom of something or other, I forget what. They came on a card, probably from Walmart. I've had them in a junk box for a few years and that's about all I remember about them.
Anyway I took one that's a probably 5/8" across and about 1/16" thick or maybe a little less and stuck it over the N non-button so I'll quit finding myself on the home screen when I'm lost in a book and forget not to touch there. It works just fine. I no longer have a Home button but so far, reading with it like this a bunch today, I haven't found any time that I really need one. I can always just hit Back to go to the home screen.
So far this has worked perfectly. I originally used this felt thing because it was all I had that might work and I thought I'd replace it with something nicer looking later but actually it looks fine and I think I'll just leave it be.
This is a really big improvement in the NGP. Maybe I'll patent it and try to sell it to B&N.
It turns out the N button is really fairly useless, at least so far. It's only purpose seems to be to make reading more difficult. I think this is a bit similar to the Nook HD design in that they did all sorts of things in weird ways that didn't work very well and made the device a lot clumsier to use than it had to be. It kind of reminds me of a line from an old song by Allen Sherman "There is a saying that is true as well as witty that a camel is a horse that was designed by a committee".
They really made some dumb design choices in this thing but like the Nook HD it's a pretty nice device anyway.
Barry