[stumped]

i have now put play store 4.03 on both my devices ( I can do that now that I have google services framework installed on the Fire HDX ). Sync and archive is working ok now.
I will just forget about the amazon store version & its issues

Also, in doing that I accidentally solved the missing page border effect issue. the border effect is there if the app is in its default "light" home screen mode,but toggle it to dark mode from the home screen toggle,& then that effect goes awol, no matter what book level custom theme settings you add.

Could be a bug, could be a design feature. I am done fretting & testing, unless a new deal breaker bug appears.

All my reading-in-progress books have been moved into moon+ pro , which is now promoted to be my #1 reader. I still don't understand moon's concepts of background colour vs background image & how they interact, but I found some workable theme settings.