[Dopedangel]

I am not sure if i should make a separate thread or request here.
But anyway would it be possible to have grouping and sub grouping in calibre companion Search restrictions are good for calibre but in a device like a tablet where you are actually opening books with I think hierarchical system would be better for example
I choose a tag

Fantasy I should get 3 options 1. Authors 2. Sub Genre 3. Series
If I select an authors and then select and Author I should get 1. Series and below all the other titles he has written.
If I select 2. Sub Genre I should get 1. Authors 2. Series
If I select 3. Series I should get all the series of the genre listed

Another thing many of us use a yes no column for marking books read an ability to hide read book would also be nice something like we get in the media system xbmc