Again, fantastic worldbuilding and setting from this author. Good characters and plot, too, although there is gender imbalance and mild sexism at times. Much great speculation regarding alien civilisations.
My only major issue is with the narrative style this is written in, in journalistic fashion that rushes back and forth in the timeline and relies heavily on telling rather than showing.
It works for this story, but I'm not a fan of it in general and it's not the way I would've written it. :P