Kindle Book Updates

I was digging around in my Amazon settings today and stumbled across this one nestled at the bottom of Manage Your Content and Devices --> Preferences

I know a lot of folks here are against Amazon's forced updating of books (as am I), so this one might help those who were not able to move everything to Calibre in time to use elsewhere. At least there's a way to stop them from pushing stuff without you knowing. Hope it helps someone!