Hello meme,
First of all I want to thank you for creating this great plugin for Calible.
Then I would like to ask you a question. Is there any way (maybe I'm not smart enough to find it

) to put books into a collection. For me the best scenario would be to put tags on a book in Calibre and when I use your plugin to automatically create the collection (if it doesn't already exist) based on that tag and then assign that book to that collection. This way Calibre would be a great backup for my Kindle.
Once again I wish to thank you for all the effort you put into this plugin.