Citizen of the Galaxy is probably Heinlein's most mature juvenile novel and is certainly one of his most inspirational. It contains a sweeping indictment of slavery and provides a stirring message about citizenship and civic responsibility. Thorby is a slave; the only memories he has are a tangled morass of mistreatment spread among faceless men on nameless worlds; all he brings with him to Sargon are a filthy piece of clothing and an ugly assortment of scars and sores. On the block, no one values him enough to even bid on him, all except for the beggar Baslim. He takes him home (a hole beneath the abandoned amphitheatre) and raises him as a son rather than a slave. Thorby learns the art of begging from his new Pop and enjoys the happiest years of his life with him. Then Baslim, whom Thorby eventually learned was much more than a simple beggar, is arrested as a spy.
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