Provide a brief summary of the novel "Never Let Me Go".
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Never Let Me Go is a dystopian novel by Kazuo Ishiguro that tells the story of three friends who attended a school together that, unbeknownst to them, was preparing them for a grim fate. As they grow up, they begin to understand their true purpose and are forced to confront the moral and ethical dilemmas presented by their impending destiny.
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