From a public-domain book on Egypt. For some reason I chose a smaller DX font here too.
Light from thewindow behind the Kindles was making the top left of the
DX display mainly a glare.
The smaller fonts have less spacing between lines.
If you don't want to read across a wide page, you can choose to add a margin
to get a more column-like layout. This is a mild margin, and there's
one that makes a very narrow column as well.