Tsilhq?t'?n, also known as Chilcotin, is a northern Athabaskan language spoken by the people of the Chilco River (Tsilhq?x) in Interior British Columbia. Until now, the literature on Tsilhq?t'?n contained very little description of the language. With forty-seven consonants and six vowels plus tone, the phonological system is notoriously complex. This book is the first comprehensive grammar of Tsilhq?t'?n. It covers all aspects of linguistic structure — phonology, morphology, and syntax — including negation and questions. Also included are three annotated texts. The product of decades of work by linguist Eung-Do Cook, this book makes an important contribution to the ongoing documentation of Athabaskan languages.