I always get down voted for this but just get kindle and turn on the airplane mode the moment you receive one.
I think Kindle is the only thing that will last for decade(source: mine did) at a ridiculously cheap price range subsidized by their bookstore we won't use.
As much as I hate proprietary shit, Kindle is just the best ebook reader out there. It lasts forever, in terms of both battery life and the device itself, smooth, top notch UI... etc
When I first bought my new Kindle PW, I immediately turned on Airplane mode and never turned it off. I use Calibre & DRM free ebooks and I had 0 issues.
How about email? I use ntfy as well but it sounds like email is the right answer for you.