Many thaks, sjpt. You are very kind.
I was finally able to open these books after deleting and re-downloading them - not sure why that mattered, but it worked.
In the past, I have read epub library loans on my Android tablet through various apps - they too have been authorized with my Adobe ID, but I would prefer reading on an e-ink device. I guess I will have to seach out a 2nd ereader to go along with my e-ink kindles. Do you recommend any in particular over others? It looks like I'll be able to move these books via USB from my laptop to an e-ink device and now I wonder if they are pretty much equal in making that an easy process!
It is frustrating to think that it is probably possible to make an e-ink reader that can handle both Kindle, EPub, pdf, Apple and all others, but they just won't make it ....... especially when any tablet can defeat their attempts at remaining exclusive via the use of various apps! I just so prefer reading on an e-ink device. I suppose there aren't enough of us that prefer e-ink to matter.
Again, thank you for your help.
Carole