title_body: How do I import an EPUB e-book into my Kindle? How do I import an EPUB (.epub) e-book into my Kindle considering that file format is not native to Kindle's?
upvoted_answer: I figured it out as I had not received an answer:
  
  
  Download the open-source Calibre e-book management software from
  here.
  Once it's installed, open Calibre and add an EPUB e-book to its
  library by clicking on the "Add books" button.
  After you have added the e-book to the Calibre library, select it,
  and then click the "Convert books" button.
  This will open a new window with a few options and formats to
  convert to.  
  Select ".MOBI" for the format.  This is important because .MOBI is
  compatible with Kindle unlike .EPUB.
  Once you've converted it, you can plugin your Kindle and use Calibre
  to send the .MOBI e-book version to your Kindle so you can read it
  there.