It appears this site (Github pages) is trying to require Javascript in order to read it.
At the same time the top comment is suggesting EPUB should not require Javascript.
I never use the HTML markup, CSS, etc. when I read an "ebook". I dump it to text and read it with less(1). I do not need to see images. I just want to search and read text. I use stupid simple shell scripts; something like the following.
#!/bin/sh
printf "(\n"
for x in ${1-*.epub};do
echo printf \'\\n\\n,,,,,,,,,,,,,,,,,,,,, "$x" ,,,,,,,,,,,,,,,,,,,,,,,\\n\\n\'
7z l $x|sed -n "s/.* /7z x -so $x /;/nav.xhtml/d;/[tx]ml$/p"|sort -n
done
echo ")|tr -cd '[\\\12\40-\176]'"
At the same time the top comment is suggesting EPUB should not require Javascript.
I never use the HTML markup, CSS, etc. when I read an "ebook". I dump it to text and read it with less(1). I do not need to see images. I just want to search and read text. I use stupid simple shell scripts; something like the following.
Example usage: If I need to to adjust the order of the sections, I do something like If I want to save the "ebook", I can compress the .txt smaller than any of the "ebook" formats. Plain text is portable for me; works on both BSD and Linux.