Somewhat off topic: in which folder does Amazon store books by default? I ask because I have a report that CC on the Fire (2015) basically is useless because downloaded books can't be opened in the built-in reader app. I have no idea what exactly the person has done, for example whether the books are amazon-format or epub, but it would be nice to have a few facts before starting down this maze of twisty passages, all alike.
Thanks.