title_body: How can I put footnotes in an ebook? I am currently formatting a manuscript into ebook formats (epub and mobi). My manuscript contains many footnotes, and I don't know how to handle them.
  
  It's important for me that these be footnotes rather than, say, endnotes - they're humorous asides; I need the user to be able to glance at them and be able to get right back to the main text (and also, not to get a peek ahead at the next dozen footnotes from future chapters...).
  
  I'm interested in both officially supported markup for major devices (I know the Kindle Paperwhite now has inline footnote functionality), and in workarounds which produce a good final result.
  
  Kindle footnotes:
upvoted_answer: I don't think there is an official way to put footnotes, at least in EPUB2. What I do in the ebooks I prepare is to add an hyperlink to the note (placed in a chapter of its own at the end of the book, and to put at the end of the note another hyperlink which goes back to the original position. It's a bit ugly, but at least it helps readers (in the sense of people, not devices!)