This publication presents the first documentation of Nzadi, a Bantu language spoken by fishermen along the Kasai River in the Democratic Republic of Congo (DRC). It is the product of extensive study by the authors and participants in field methods and group study courses at the University of California, Berkeley, and consists of ten chapters covering the segmental phonology, tone system, morphology, and sentence structure, followed by appendices on the Nzadi people and history and on Proto-Bantu to Nzadi sound changes. Also included are three texts and a lexicon of over 1100 entries,...