[MengerSponge]

If you're even the slightest bit tech savvy you can find a DRM stripping utility for Calibre. Apprentice Alf is long retired, but a fork of that DeDRM still is maintained

[cbdevidal]

Newer Kindle books published in the last few years require more than the Calibre plugin. Amazon is tightening the loop.

https://www.reddit.com/r/Calibre/comments/1q1uza4/successful...

[bentley]

Life is too short and my reading backlog too large for me to spend any time, money, or effort whatsoever on DRMed books.

There are enough copyright‐expired and copyrighted‐but‐DRM‐free books to keep me fully occupied in perpetuity.

[trashface]

I just tried this _today_ and its not easy, you need DeDRM and at least one or two other utilities. I have yet to convert a single book.

[pjmlp]

It never worked with the few books I got from Amazon, because I could not get them anywhere else. I usually only buy epub/pdf.