Mursi is a Nilo-Saharan language spoken by a small group of people who live in the Lower Omo Valley, Ethiopia, and is one of the most endangered languages of the country. Based on the fieldwork that the author conducted in beautiful villages of the Mursi community, this descriptive grammar is organized into fourteen chapters rich in examples and an appendix containing four transcribed texts. The readers are thus provided with a clear and useful tool, which constitutes and important addition to our knowledge of Mursi and of other related languages spoken in the area. Besides being an empirical data source for linguists interested in typology and endangered language description and documentation, the grammar constitutes an invaluable gift to the speech community.