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Lyonesse: Madouc, a work by Jack Vance, was awarded the Jupiter Award. This award is given to recognize excellence in science fiction and fantasy literature. Lyonesse: Madouc is a novel set in the mythical kingdom of Lyonesse, and it follows the adventures of Madouc, a young man who must save his kingdom from an evil sorcerer. The novel is known for its rich world-building, complex characters, and exciting plot.