dontblinkLooking for an ebook reader (hardware) which doesn't hold a proprietary OS
bbbhltzI’ve looked into this in the past and settled on Kobo. You can disable the telemetry and never use the the Rakuten account part and have a very good ereader… And you can install the open source KOReader software.
MobileRead forums and wiki are a good resource for ebook stuff.
For example, a breakdown of the hidden configs on Kobo devices wiki.mobileread.com/…/Kobo_Configuration_Options
GitHub - koreader/koreader: An ebook reader application supporting PDF, DjVu, EPUB, FB2 and many more formats, running on Cervantes, Kindle, Kobo, PocketBook and Android devices
An ebook reader application supporting PDF, DjVu, EPUB, FB2 and many more formats, running on Cervantes, Kindle, Kobo, PocketBook and Android devices - koreader/koreader
N1cknamedMy kobo is great. You never have to connect it to the internet if you don’t want to. I transfer epub files to it via USB.
reallyzenSame here. I only buy drm-free from ebooksdotcom, and transfer them with caliber. My kobo wifi isn’t even configured.
massive_bereavement*Calibre. (link for those that don't know it: https://calibre-ebook.com/)