This book is the first comprehensive grammatical description of Uchumataqu, the lost language of the Uru of Lake Titicaca in north-western Bolivia. The Uchumataqu language became extinct around 1950 and although several researchers had documented the language during the first half of the 20th century, their results were never considered in a comprehensive context. Some of the most ample studies even remained unpublished.

This book is aimed at linguists from all disciplines but is of equal interest to anthropologists, Americanists, historical linguists, typologists, and linguists with a special interest in Andean studies.