This book is the first comprehensive grammar of the Udihe language, a highly endangered and previously undescribed Tungus language spoken by about 100 people in the Russian Far East. The grammar is almost unique in being a substantially complete description of a Tungus language. It is organized in the traditional way: a general introduction discussing the geo- and socio-linguistic status of the language is followed by an account of its phonology, morphology, and syntax; appended to this is a selection of texts, a thematic vocabulary, a full bibliography, and a subject index. The description is based on extensive field materials collected by the authors among native speakers of Udihe between 1989 and 1997. It is illustrated by rich empirical data in the form of sentence examples and a collection of folklore texts with glosses and English translations. Much use is made of cross-references between chapters and sections, so that relevant information can easily be found. Although the authors have drawn attention to phenomena that may be of relevance for modern linguistic theorists, the grammar is not biased towards any particular theoretical approach, and care has been taken to ensure that the terminology used is theory-independent. The book may be used as a reference grammar by scholars working within differing theoretical frameworks, and will be of special interest to students of linguistic typology.