Geoffrey Kimball presents the first grammar of the American Indian language Yukhti Ky better known in English as Atakapa once spoken in coastal southwestern Louisiana and coastal eastern Texas. The late eighteenth and early nineteenth centuries saw a drastic fall in the Atakapa population and by the first decades of the twentieth century the Atakapa language ceased to be spoken. The grammar is based on the field notes collected by Albert Samuel Gatschet in January of 1885 with additional material collected by John R. Swanton in 19078. Gatschet worked with two speakers of the language Kisyuc also known as Yoyot and her cousin Tottoks whose English names were Louison Huntington and Delilah Moss respectively. John R. Swanton wrote a grammatical sketch of Atakapa in 1929 based on Gatschets notes and in 1932 published the texts Gatschet had gathered as well as a dictionary. The materials originally written phonetically have been phonemicized and the nature of the grammar has been elucidated. The nine surviving texts in Yukhti have been phonemicized analyzed and translated and the parallels between them and other traditional oral literatures of Native American languages of the Southeast are discussed. This reference grammar includes a vocabulary of all words contained in the field notes. Geoffrey Kimball is a research associate in the Department of Anthropology at Indiana University. He is the author of Koasati Traditional Narratives Nebraska 2010 Koasati Dictionary Nebraska 1994 and Koasati Grammar Nebraska 1991.