I have been looking for a larger format e-reader for a while to read computer manuals, reference books that are usually A4 PDF’s.

This looks like it could be worth a look.  I think it is probably going to be useful to the Motorhomer/Fulltimer for documents and technical manuals etc.

It comes with a pen that can be used for drawing, or annotating documents.

I have it on my Christmas list as a present for myself.

https://amzn.to/3E4mTNr