I wish to make cosmetic changes to the PDF exports (e.g. add the cover image) and distribute the modified file instead of the one generated directly by Pressbooks.
Can I somehow make my modified file available to readers through the “Download this book” menu in the webbook?
You would depend on UW Pressbooks admin each time you need to replace the tweaked PDF and EPUB on the server.
Are you sure you cannot do the tweaks inside Pressbooks?
If there is no way to get the desired result inside PB, you could switch off the download of the files for the book and create download links to the files in the preface of the book. You could host then PDF and EPUB anywhere. Maybe you could even upload the PDF and EPUB to the media library of the book, if the PB site allows to upload EPUB files.
All those suggestions are very useful, Thomas, thanks a lot.
As for whether I can do the tweaks inside Pressbooks, I have looked for it everywhere and I could not find it.
Thanks so much!
Luis