Four-Day Planet by H. Beam Piper is a thrilling science fiction novel set on the dangerous, lawless planet of Fenris. The story follows a young journalist named Walt Boyd as he navigates the treacherous terrain and inhabitants of the planet in order to uncover a sinister conspiracy. Piper's world-building is incredibly detailed and immersive, painting a vivid picture of a harsh and unforgiving landscape. The characters are well-developed and dynamic, each with their own motivations and flaws that drive the action forward. The pacing is fast-paced and the plot is full of twists and turns that keep the reader on the edge of their seat. Overall, Four-Day Planet is a compelling and entertaining read that will appeal to fans of science fiction and action-packed adventures.

Book Description:
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. (Introduction from the Gutenberg text)