Если кто не в курсе: DeDRM AppleScript for Mac OS X

I hoped all users of these de-drm tools would have been sensible enough to realize that de-drmed ebooks should not be uploaded to open servers, torrents, or other methods of mass distribution. No help will be given to people doing such things, and no links to such books should be posted here.

Authors, bookshops and publishers all need to make a living, so that they can continue to produce books for us to read. Don’t be a parasite.

via apprenticealf.wordpress.com

По совету Wired, однако. С купленными книгами на Amazon для Kindle for Mac вполне работает.
К вопросу о том, что бессмысленно запрещать копирование. Продуктивнее регулировать коммерческое использование.