The Paradox of the Sets: Daedalus Mission, Book Six

The final contact made by the Daedalus Mission begins badly, even before the ship makes a hard landing in the middle of nowhere. The situation of the colony doesn't seem to make any sense, and neither does the situation of the indigenous aliens--the Sets--that have helped the colony survive and thrive. Alex Alexander doesn't take long to work out a hypothesis that might explain the mystery--a hypothesis that the people on the ground have already worked out for themselves--and he's fortunate...