This volume provides the first full description of the grammatical structure of Tommo So, a language of Mali, West Africa. It is one of about twenty languages of the Dogon people, best known for their masked dances and distinctive cliff villages. Like most African languages, Tommo So is tonal and displays a rich system of grammatical tone, wherein the tonal realization of a word depends on its syntactic context. In addition to a grammatical description, this book offers a wide range of naturalistic texts, making it of value to linguists and anthropologists alike.