H. Beam Piper's Books
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Uller Uprising
This eBook has been formatted to the highest digital standards and adjusted for readability on all devices. Uller is a corporate world where the natives (silicon humanoids with four arms and a face like a lizard) are ruled by Terro-Human Company. Natives, who outnumber humans, but aren't as advanced, have had it up with the imperialist Company and start a rebellion which will see many dead on both sides.
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Four-Day Planet
Fenris isn't a hell planet, but it's nobody's bargain. With 2,000-hour days and an 8,000-hour year, it alternates blazing heat with killing cold. A planet like that tends to breed a special kind of person: tough enough to stay alive and smart enough to make the best of it. When that kind of person discovers he's being cheated of wealth he's risked his life for, that kind of planet is ripe for revolution.