For use in schools and libraries only. The inhabitants of Pern are threatened by a band of renegades that attempts to expose them to deadly airborne spores in the atmosphere.
As long as the people of Pern could remember, the Holds had protected them from Thread, the deadly silver strands that fell from the sky and ravaged the land. In exchange for sanctuary in the huge stone fortresses, the people tithed to their Lord Holders, who in turn supported...