All the Weyrs of Pern was published by Ballantine/Del Rey in 1991 and represents the culmination of the plot threads established across the previous Pern novels. The discovery of the Landing site (hinted at in The White Dragon) leads to the activation of AIVAS — the Artificial Intelligence Voice Address System, a computer that has been dormant since the colonists lost access to their technology over 2,500 years ago.
AIVAS reveals Pern’s true history: the colonists came from Earth, genetically engineered the dragons from native fire-lizards using advanced biotechnology, and intended to maintain their technology but were overwhelmed by Thread and forced into a gradual regression to pre-industrial society. AIVAS also reveals that Thread can be permanently eliminated — not by fighting it Pass after Pass for eternity but by altering the orbit of the Red Star that brings it. The plan requires the dragonriders to learn new skills (including space travel — dragons can teleport, and AIVAS proposes using this ability to deliver explosive charges to the Red Star’s surface), and the social consequences of reintroducing technology to a feudal society are enormous.
McCaffrey uses the AIVAS plot to address questions that had accumulated across the series: why do the dragons exist? What happened to the colonists’ technology? Can Pern break free of its endless cycle of Thread and recovery? The answers transform the series from fantasy into hard science fiction, and the novel’s resolution — Thread eliminated, technology gradually reintroduced, Pern’s future opened up — brings a satisfying closure to the overarching narrative even as later novels continued to explore the world.
Collecting All the Weyrs of Pern
First edition (Ballantine/Del Rey, New York, 1991): Hardcover with dust jacket.
Market values:
- First edition, fine/fine: $20–$50
- Very good: $10–$25