[homeceo43]

** SOLVED!! **

Go to "My Shelf" then tap the 3 dots on top right side of screen and select "Rebuild book covers".

This pops up:

Rebuild book covers
Render Quality (Size) 110

I thought the word "Size" and "110" referred to image size since the "110" number was the same as the My Shelf Book Cover(Size) under Options. Changing that number under Options does change the image size (not quality), say change to 150, your book covers are bigger.

Under the My Shelf Rebuild book covers, I changed the number to 130, or 150, etc and the image size was not getting bigger. Then I used 300 here just to see what would happen, and the Book cover image quality improved drastically (images size or dimensions stayed the same [110]). Now I have high quality book covers!