As I see it, some time ago a cat and mouse gaming around started between people who see as not only their "legal" and "moral", but also "patriotic" "responsibility" controlling people's access to information which is in the public domain anyway. Even archive.org is doing that (imagine what Jon Schwarz would have thought of that).
https://archive.org/post/1095379/unable-to-download I have read about some ways around such road blocks but apparently they aren’t reliable enough: https://superuser.com/questions/1027608/how-to-read-an-acsm-file-on-linux https://askubuntu.com/questions/461409/how-can-i-remove-the-drm-from-an-epub-file Is there a Debian way to handle such problematic. By the way all those books, "the source", mind you, legally is in the public domain anyway. lbrtchx