Colonists return to planet to try to keep aliens from eradicating humans - 4.5 stars
Colonizing a newly discovered planet is hard. It is worse when aliens return claiming it was their planet all along and then enslave the humans. Travels through space have their own tribulations which become species-threatening when the aliens (Scythians in this case) bring their desire to conquer everything start to play out.
We are presented with FTL (faster than light) travel, trips between Earth and Concordia, power struggles, and ego clashes. This time a teenaged girl (Miki) makes a difference while a struggle just to stay alive makes the story shine.
Negotiation skills, while not initially successful, help to focus humanity's considerations. Given the differences in physical size, locomotion (flying v walking), and atmosphere necessary for life (CO2 v O2), it is unlikely that the primary parties would ever meet face to face.
Trekking across unforgiving landscape combined with bickering by the small group of humans gives a glimpse of what humans after crash landing on the planet surface can endure. Considerations for landing in a desolate area, warfare and living together in trying circumstances is what makes this story exciting and worthwhile.