Dune
Frank Herbert · first published 1965 · ISBN 9780441013593
Paul Atreides arrives on the desert planet Arrakis as part of a political maneuver by his family, only to find himself caught in complex webs of prophecy, religion, ecology, and power. The novel interweaves planetary science, economics, warfare strategy, and the psychology of leadership into an intricate plot where no decision is simple.
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Essential Science Fiction Novels
Dune set the standard for SF epics and proved the genre could sustain intricate plots with political weight. It remains unmatched in how thoroughly it imagines a alien world's ecosystem, culture, and economics as unified systems.