All the Weyrs of Pern - Dragonriders of Pern Book 11
When AIVAS - the Artifical Intelligence Voice Address System - was first discovered at Landing, the entire planet of Pern was awed ast the knowledge it divulged. All the history of the people of Pern was there.
Dragonholders, Lord Holders and Craftmasters crowded into the tiny inner room to learn the secrets of their beginnings. And AIVAS had other gifts to offer - stored information of old crafts that had been forgotten, of medicine, music and technology.
But the greatest promise AIVAS offered was the chance to rid Pern of Thread forever. Jaxon, F'lar, Lessa, Piemur, and all the great ones of Pern, began the long and arduous task of learning just how to operate the incredible plan - a plan of such daring and epic proportions that both dragons and riders woudl be at risk.
Condition - Good, cover and spine are creased and marked. The Spine is sun bleached. The spine is visible between pages 360 and 361 however the pages are still held firm.