All the Weyrs of Pern / McCaffrey, Anne

The greatest dream of the dragonriders was to find a way to eradicate Thread completely, so that never again would their beloved Pern be threatened with destruction.

The dragonriders of Pern have dedicated their lives to fighting Thread, spores that rained on and ravaged the land, and now they finally have the chance to eradicate it forever.

The people of Pern, having battled the dreaded Thread for generations, gain new hope for eradicating the plague completely when they excavate the still-functioning voice-activated artificial intelligence system used by the planet's original settlers.

The greatest dream of the dragonriders was to find a way to eradicate Thread completely, so that never again would their beloved Pern be threatened with destruction.