[helloworld11]

Now you're just engaging in silly semantics. Yes, in all practical sense, you absolutely do own the DRM-free books you've stripped of their rent-seeking garbage. You could even take that to court and quite heavily argue that because you bought them as claimed property, they're yours. You might not win, but a case could be made and in any case, you could move digital copies anywhere you want. The ones doing wrong here are the companies that try to impose DRM on things people are buying under a notion of ownership, That these also randomly erase or reclaim things they claim to have sold only makes the wrong worse.