Sectors Twenty-Four & Twenty-Five

From publisher blurb:

The exploration of "Unexplored Space" continues with Sectors 24 & 25. You'll find a few colonies in this tome, but you'll also find lots of planets waiting to be explored, and planets that were once colonized, but no longer are.
There are more machine culture colonies that have been abandoned, and civilizations that have died, plus worlds that are screaming out to be explored, with dangers that characters can't even begin to imagine.