title_body: How do I export Wikipedia article collections to epub?
upvoted_answer: This feature was removed as the result of changes of the mwlib that was used for export to ocg that has better support for non-latin scripts for PDF files.
  
  In the process EPUB export was disabled, probably because the ocg library renders to images via LaTeX (that is a guess, I have not looked at the details).
  
  The announcement for the change was made on the wikitech mailing list, 
  
  
    As part of this change, we will disable ZIM and EPUB export for the
    time being. If you're interested in working on ZIM or EPUB support for
    the new offline content generator, or other export formats, please let
    us know via the above channels.
  
  
  and it looks like it has not come back yet.
  
  What that "weird" page does is take the source of the wikipedia page, which has the page description, and tries to render it to ePub. That should give  better results than e.g. starting with the HTML version or the rendered PDF.   I normally caution to not use such cloud based rendering services, but since the input you feed it is public anyway, you won't have to fear that the data you upload there gets stored for further use by the website owner.