"Kwaza is an endangered and unclassified indigenous language of Southern Rondonia, Brazil. Kwaza, also known in the literature as Koaia, is spoken by around 25 people today. The present work consists of three parts. Part I contains a thorough description of the phonology and morphosyntax of the language and a brief overview of its social, cultural and historical context. Part II contains a diverse selection of transcribed and translated texts with interlinear morphological analyses. Part III is a dictionary of Kwaza, including many examples and an English-Kwaza register. This description is of interest to linguists in general and to anthropologists and historians interested in the Guapore region."van der Voort, Hein is the author of 'Grammar of Kwaza', published 2004 under ISBN 9783110178692 and ISBN 3110178699.