I’m looking to change my reading and buying habits away from Amazon and need an alternate source for my ebooks. Where can I buy ebooks that won’t expire or have their licence revoked and will allow me to download a copy of that ebook I can store on my own system regardless of the websites status?
Librature has a list of DRM free individuals and small presses https://libreture.com/bookshops/
Oh I forgot also if you check the details on kobo, some of the books are sold DRM free. Mostly I think it was from Tor, but could be other publishers as well.