While John Christopher (1922-2012) was born as Sam Youd, he chose to write his science fiction books under multiple pseudonyms. Well known for his young adult book The Guardians, he won numerous awards for his work. He also wrote The Tripods, which is a series of young adult books that imagine a post-apocalyptic world.

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Title: Empty World, Author: John Christopher
Title: The Prince in Waiting, Author: John Christopher
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