Amazon Kindle purchases to Epub?

[cathugger]

Nope - not legally.

Almost every commercial ebook (Kindle, Nook, Sony, iBook, Kobo) is DRM-protected, encrypted such that that are only readable on a device or reader software from the same ebook company and registered to the same account that bought (or was gifted) the ebook.

So conversion software like Calibre cannot read the ebooks & cannot convert them. This keeps people from printing, stealing or duplicating the ebooks.

Exception - a very few ebooks at Amazon say something like this on the sales page "At the request of the publisher this ebook is being sold without DRM protection". Those few ebooks could be converted to another format with Calibre.