The current version for Calibre e-book manager and reader is 0.9.42 and brings to the table a small set of new features and bug fixes.
Starting this release, the application can use the categories on Amazon as tags when retrieving metadata via said resource. This is the default action but it can be turned off from the configuration panel.
Now there is the option to modify the styling in books when adding content to Kobo reading device, based on a template available on... (read more)