Doona

As a contract--for the cohabitation of the planet Doona between humans and the cat-like Hrrubans--comes up for renewal, an unknown entity sabotages the heretofore successful alliance, in Crisis on Doona, while the peace between the humans and aliens once again is threatened when a race of alien visitors proposes a trade agreement that Doona's leaders begin to question, in Treaty at Doona. Original. 15,000 first printing.