Baen Books are a long established publishers of science fiction and fantasy, much of their back catalog are available to download for free including works from authors such as David Weber, Mercedes Lackey and David Drake.

Beyond This Horizon
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Brothers in Arms
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Cetaganda
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Code of the Lifemaker
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Ethan of Athos
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Falling Free
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Memory
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Podkayne of Mars
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Realtime Interrupt
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Rockets, Redheads and Revolution
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Sunrise Alley
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The Genesis Machine
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The Proteus Operation
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