As far as I know this isn't a given -- Amazon would have to explicitly pull it off devices. I don't know how often this actually happens, but I suspect if it happened with other ebooks on a regular basis we'd have probably heard about it.
Having said that, it's certainly possible to use a plugin with Calibre to strip DRM from ebooks and copy them to your computer from the Kindle. And, I'm not sure whether Amazon can delete books that don't have DRM in the first place; not all Kindle books do. (I don't know whether Spots does, but AFAIK, I don't have it enabled on Why Coyotes Howl.)
As far as I know this isn't a given -- Amazon would have to explicitly pull it off devices. I don't know how often this actually happens, but I suspect if it happened with other ebooks on a regular basis we'd have probably heard about it.
Having said that, it's certainly possible to use a plugin with Calibre to strip DRM from ebooks and copy them to your computer from the Kindle. And, I'm not sure whether Amazon can delete books that don't have DRM in the first place; not all Kindle books do. (I don't know whether Spots does, but AFAIK, I don't have it enabled on Why Coyotes Howl.)
— Chipotle