Covering the origin and evolution of the Kafers, the Kafer Sourcebook goes into the details of the Kafer homeworld and explains Kafer motivations and drives, their history, their society and social structure, and their technology. The Kafer Sourcebook details the political and governmental structure of the Kafer Associative, discusses the political motivations behind the war, and explains why it will get worse. The Kafer Sourcebook enables the 2300 AD referee to introduce new items of Kafer weaponry and equipment, as well as more complete details of previously described items. The equipment chapter is copiously illustrated (with some illustrations in full color). The players can be introduced to Kafer artifacts, which range from hand tools and small arms up to the Sigma-class starship... A full-color map of the Kafer Sphere is included, extending beyond the boundaries of the original game map. The Kafer Sourcebook also presents a complete listing of the more than 30 new stars not included on the original game map, as well as those already covered. Introduced in the Kafer Sourcebook is a new alien race, unknown to humanity so far but important to the understanding of certain aspects of Kafer technology and history. The Kafer Sourcebook also presents a treatise on Kafer language, including a pronunciation guide, a short vocabulary, and samples of Kafer ideographs.