Probably controversial on my next few words but use your phone as an ereader.
Go through a couple of apps for ebooks (FDroid as a few) until you find the app that most suits your needs.
Amazon is not your friend, so try to explore other venues; Smashwords has a pretty interesting catalog. Project Guttenberg has a good number of older texts and public domain books, all for free.
I am sure other options exist, especially if willing to navigate the high seas.
Phones don’t provide the same experience as an e-reader with e-ink. The best option, IMO, is to get an e-reader that allows sideloading and works without Internet connection, so you can read books about the high seas.
I have an e-reader as well as a phone, tablet, and paper books and honestly I still prefer my phone over anything else. With my phone it’s easier to look up words/concepts I don’t know if I want more than a simple definition of the word. Sometimes I will use the e-reader with my phone next to me for when I want to look something up. These days I would say paper books are my least favorite medium though. Big, bulky, and it’s more work to read them in the dark.
