This is a follow up to my previous post.
Another way to expand the library of your Kindle for PC is to use Calibre in conjunction with it. As good as it is, Calibre, in my opinion, has one weakness – its eBook rendering application is not very good in displaying ebooks. But there is a way around this You can use Calibre’s “save to disk” option to export your ebooks to Kindle for PC.
On Calibre’s screen, highlight the book you want to read on Kindle for PC and click on the “Save to disk on a single directory”. Then let Calibre save it to your Kindle for PC folder (found at “My Documents” –> “My Kindle Content”), Once saved successfully, open Kindle for PC and the new eBook should be visible in the main screen on your PC’s Kindle. Just make sure that the ebook you are saving is already in .mobi or .prc format.