Today I purchased some Marathi books from Amazon for reading on smartphone. IIcan read them to kindle app available on google play. Ca I convert this books in EPUB so that I can share those books on this forum.
Connect your kindle to a PC and check al the folders. But, before you d that, sync your kindle to amazon account. So that the books will be downloaded to your kindle.
You can also try downloading calibre and see if it will convert the kindle files to your chosen format. It works for some people, so it is worth looking into.