i mean... less?

the main thing you'd want out of a good e-reader is font customization. which you can't do on an application basis in the terminal.

I use pandoc to convert the epub to a .txt file and read it with emacs or "less". There are much more efficient ways to do the conversion but I haven't bothered scripting one.

are you looking for an epub/pdf to txt conveter?

I've only used epy in the past it was fine but looks abandoned now. It seems now there is lue looks like it has a lot more features.

I'm (genuinely) curious about why you want a command line ebook reader?

I bet you’re looking for zathura.

It looks like you already got some good suggestions that don't require an additional application but I was going to mention, if you use Emacs any, nov.el is a really great ereader; I've read much more, since discovering it.

hygg does the job

I don't get these stackoverflowy comments, very weird

epr/epy is all I'm familiar with

What do you even expect from the "command line ebook reader"? Are more/less or even cat good enough?

I was also searching for one a couple of months back. I went through these ones : termpdf.py, tdf ,fancy-cat, meowpdf

Most of these support pdfs only though from what i can recall. I ended up with Sioyek (not a terminal reader)

This is getting out of hand

Do you want to read books with ragged margins? Ew.