I want to merge my audiobook collection into Calibre but need to keep it distinct from the current library which is exclusively eBooks. I'm having trubble finding reference to a record characteristic that could be used to distinguish between the two types of books (and eventually an old paperback collection).
I've tried tags and haven't been able to find a clear and efficient way to use them.
Any/all suggestions would be appreciated, though my preference is a column other than tags that can be used. Otherwise it seems that I would have to resort to a custom column—not my first choice, which is why I'm bothering you.