Device is the XTEINK X3. Perfect pocket device for reading on my lunch breaks at work. Without the folding car, the device is about the size of a third of a deck of cards.
Here's a pic of the text (no spoilers)
I have the Bluefox NX1 and would definitely recommend it if it's the right fit for you. It runs Android 15. I use it for a secondary alarm clock, offline maps, music player, and bulk storage of off the grid media like Wikipedia and book guides for whatever I can find.
Here it is next to the case for my S23 Ultra:
I can get more pictures later if you want.