"Four-Day Planet" is a science fiction novel written by H. Beam Piper and published in 1961. Set on the remote planet of Fenris, the story follows the adventures of Conn Maxwell, a young journalist working for the local newspaper. Fenris is a harsh and dangerous world with a unique four-day cycle, where extreme weather conditions and deadly creatures pose constant threats to its inhabitants. When a corporate conspiracy threatens the livelihood of the colonists, Maxwell finds himself at the center of a tense struggle for survival and justice. With the help of his friends and allies, he embarks on a daring mission to expose the truth and save the planet from corporate exploitation. Filled with action, intrigue, and vivid world-building, "Four-Day Planet" explores themes of corporate greed, environmentalism, and the resilience of the human spirit in the face of adversity. Piper's engaging storytelling and imaginative vision make this novel a thrilling read for fans of science fiction and adventure.