A Gift From Earth is a science fiction novel by American writer Larry Niven, first published in 1968 and set in his Known Space universe. The novel was originally serialized as "Slowboat Cargo". Plot summary Plateau, a colony in the Tau Ceti system, was settled by humans some 300 years before the plot begins. The colony world itself is a Venusian-type planet with a dense, hot, poisonous atmosphere. It would be otherwise uninhabitable, except for a tall monolithic mesa that rises up into a breathable layer in the upper atmosphere. This gives the planet a habitable area about half the size of California. The Captain of the first colony vessel named the feature Mount Lookitthat (from his interjection at first sight of it), and the colony became known as Plateau. After landing the slower-than-light ships, the Crew sign an agreement, called the Covenant of Planetfall, with their former passengers (who had just emerged from suspended animation and were in a weak bargaining position). This agreement gives the Crew (and their descendants in perpetuity) all control over the new colony. A system of medical care evolves, in which organ transplantation is the only method of treatment, even for cosmetic defects (such as baldness); a justice system evolves, based on the Hospitals in the two immense "slowboat" spacecraft which had brought their ancestors to the planet; all crimes are punishable by death, followed by involuntary donation of the perpetrator's transplantable organs (including skin, scalp, and teeth). Not surprisingly, only Colonists are ever arrested for crimes; and only Crew are eligible to receive transplants, except as a rarely granted privilege in return for service to the Crew. Some Colonists become dissatisfied with the system and form a dissident group called the "Sons of Earth". The prologue of the story begins with a dissident Colonist escaping Implementation, the local police force, by jumping to his death over the "void edge", the high cliff that forms the sides of the mesa. On Mount Lookitthat, all crimes are punished by being dissected for spare parts. Thus, this is considered to be the greatest of all possible crimes, as it leaves nothing to harvest. An automated Bussard ramjet arrives from Earth, carrying an unknown cargo of great importance, which the government immediately finds and conceals, but not before the cargo has been observed and photographed by Polly, an agent of the Sons of Earth. Meanwhile, Matthew Keller,