Saved and liberated the books I "bought" at Amazon for my Kindle. Amazon will stop offering the "Download & transfer via USB" option, so I have downloaded all 210 books. After downloading, I hunt them through Calibre and a certain plugin to remove the DRM stuff, convert the books to EPUB format so I have my private backup and can put them on a new ebook reader that is more open than the Amazon walled garden. And in future I will buy my eBooks someplace else. #ByeAmazon
As an academic I already use @zotero for all my pdfs, so I've moved my epubs there to. Unfortunately the zotero epub reader is only available on a computer, but since it also works in the browser I'm reading in the browser on my two booxes (eink with android and pen support). Kind of a work around at the moment but when epub support comes to the android app it will be great.
Thanks for the heads up on the removal of the feature, I'll have to check that all my books have been freed. (A problem as a European is that in not always able to buy certain ebooks from other stores than Amazon.)