I love emacs but pdftools is kind of meh. You need it for pdf tools and a different addon to read epubs that works differently.

Then it uses a lot of memory, scrolls a little slow, and doesn't remember your place in a document.

Zathura remembers your place and reads epubs and pdfs while using less ram. Conversion between epubs and pdf seems to preserve the text but often results in ugly docs that are less pleasant to read so a good solution needs to support both.

I would love someone to improve document reading to the point where I COULD use emacs for document reading.