Sequel to Ender's Game (1984) and Speaker for the Dead (1986), exploring the problems of alien contact and coexistence on planet Lusitania, where now three intelligent species dwell: human colonists; "buggers" (an arachnoid Hive Queen reasserts herself after the near extinction of her species in the human-bugger war); and the indigenous "piggies," who, after a horrid flaying-alive ceremony, metamorphose into sapient trees. But the planet is rife with descolada virus; this mediates the transformation of piggies into trees, but in humans mutates into a deadly, ineradicable plague. Rather than permit the descolada to spread, Earth sends a battle fleet to blast Lusitania. Once again, Ender Wiggin and his sister Valentine will play prominent roles in the search for a solution -- the upshot being, thanks to time travel, a "rescolada" rescue-virus that promises to turn a potential plague into a fabulous biological tool.

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