I read that Amazon is removing the ability to download books to your PC - after 2/26/2025 you'll only be able to download to your Kindle over wifi.

I spent last night sorting through 800+ kindle books on the web page and downloaded most of them to my computer, then imported them into Calibre - my ebook manager.

I'll probably look for non-DRM ebooks moving forward, there are some other ebooks in the space now. While I'm using the Kindle app on my iPhone and a physical Kindle, it might be nice to look at a third-party reader. I've seen a couple of F/OSS Android e-book readers that look interesting.