Robin Sloan has a good Ruby project that builds good-looking web pages alongside EPUB files: https://github.com/robinsloan/perfect-edition https://github.com/ro

Robin Sloan has a good Ruby project that builds good-looking web pages alongside EPUB files: https://github.com/robinsloan/perfect-edition https://github.com/robinsloan/perfect-edition It was in porting that to Racket [1] that I learned about some of these EPUB standard details. But spoiler alert, both projects just shell out to `zip` to do the actual compression. [1]: https://github.com/otherjoel/perfect-edition-pollen/blob/master/epub.rkt https://github.com/otherjoel/perfect-edition-pollen/blob/mas...