DeDRM Tools is a great software package which comes with a Calibre plugin that automatically removes the DRM of the ebooks you add (in addition to standalone DRM removing apps):<p><a href="https:&#x2F;&#x2F;apprenticealf.wordpress.com&#x2F;2015&#x2F;09&#x2F;04&#x2F;dedrm-tools-6-3-4-released&#x2F;" rel="nofollow">https:&#x2F;&#x2F;apprenticealf.wordpress.com&#x2F;2015&#x2F;09&#x2F;04&#x2F;dedrm-tools-6...</a>