Your Kindle feels like it's owned by Amazon because you're using their books as a service stuff. Zlibrary, Calibre, 24/7 airplane mode, and it's as yours as a ZX Spectrum my dude.
And jailbreak that Kindle and install KOReader on it, too; now it supports epub in a much more awesome reader app (not to mention having the capability to install any gtk app - I have a term emulator with ssh on mine, among others). And you're now root and can remove the amazon crap for real, no need to use airplane mode after that.