So would you guys say this one redeems Titan after the last two books?
I would say we can treat the previous Titan book like it never happened.
With the mention of Titan charting the "Gum Nebula" in the story, I think the author was probably also trying to forget the other two books as well.
Of course I can't wait to get a hold of Peaceable Kingdoms
to see how this mini-series wraps up. The first two books were not as good as the last two books. Books 3 & 4 just seemed to kick the series into high gear.