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Hadrian Jin. Skyguard. Refugee. Twelve times a day, this sixteen-year-old proprietor of Luna City's best orn-suit shop fits the wings, and jumps out into the open air to soar with the grace of an eagle. For forty dollars an hour, he can teach any groundhog how to fly bird-fashion in the moon's low gravity. But when the tramp of military boots on the road to his home forces him to flee, he finds himself adrift between planets, on the run from government agents, without hope of home. Out of his depth and thrust into danger for which he's ill-prepared, Hadrian must learn the true reason for his exile, and finally spread his own wings...