Epub2txt converts EPUB files to plain text. It is written in AWK and it runs on DOS and Unix.
For a description, see my post linked below.
<gopher://tilde.pink/1/~bencollver/log/2024-08-13-epub2txt>
https://codemadness.org/gopherproxy/?q=tilde.pink/1/~bencollver/log/2024-08-13-epub2txt