Hi,
I use Calibre now for some time and very happy with this program. In my Calibre Library I keep the books I have read and mark it in a special new collumn as "Yes, read" in color red. I keep the books in case I want to read again or send to a friend.
As I have many books which I did not read yet, I wonder if it would be possible (in the future) to change the whole line of books already read into another color in order to make it more easy to distinguish the books amongst all books. In this way it would be much easier to trace and to add new books to my Sony E-reader. My apologies in case my English not clear but I am Dutch and English is not my native language.
So I do hope you understand what I mean