Hey mehmedbasic, thanks for replying after so long, really awesome and also very suprising.
I would looove to try your app it but unfortunately my phone isn't rooted so can't install the xposed framework. Also, it seems ereolen has switched to exclusively using java in the browser to display the ebooks, so there is no offline storage of the .spkgi files.
When I get my phone rooted I will try it, but unfortunately I don't know when that will be.
Once again, awesome that you found a way to decrypt the files.
