Series
The History of Middle-earth -- 6.
We don't know whether this one is finished.
Nobody has confirmed the status of this series yet. That's a gap in our data, not a verdict on the books.
1 book here · 1988
Publication order
This is publication order — nobody has confirmed a different reading order for this one yet.
—
The return of the shadow
1988 · J.R.R. Tolkien