A Grammar of Upper Tanana, Volume 1 provides a linguistically accurate written record of the endangered Upper Tanana language. Serving as a descriptive grammar of Upper Tanana, the book meticulously details a language that is currently fluently spoken by approximately fifty people in limited parts of Alaska’s eastern interior and Canada’s Yukon Territory. As part of the Dene (Athabascan) language group, Upper Tanana embodies elements of both the Alaskan and Canadian subgroups of Northern Dene. This is the first comprehensive grammatical description of any of the Alaskan Dene languages.