How do I fix the “Content is Locked” message for books without DRM?
Ebooks with titles or author names containing apostrophes can sometimes cause this spurious ‘locked’ message and render the ebook unreadable on the Kobo (although you can read the ebook using Calibre on your computer). Using Calibre, edit the title and/or author name to remove the apostrophes and re-send the ebook to your Kobo. Alternatively, if you don’t wish to alter the title/author of your master copy in Calibre, you can manually remove any apostrophe’s in appropriate folders and filenames on the Kobo itself. This error may also occur if you attempt to remove a book from main memory by deleting the *.epub file directly on your desktop computer’s file manager. The file is gone but the database indicates it still exists; selecting it gives the confusing DRM “content is locked” instead of the more-accurate “file not found”. Deleting the entry from the Kobo books list through the menus or deleting it from Calibre should fix any such ‘zombie’ database records for deleted books.
