The objective of the present book is to give a description, as completely as possible, of the native language (a variety of Quechua) spoken in the province of Tarma, which is part of the department of Junín in the Andes of Central Peru and which is situated at a relatively short distance (northeast) of the capital Lima. The data presented here were collected by the author during two periods of field-research (1979-1971, 1974). The character of the data leads to a division of the book into three parts, namely a description of the systematic language facts (phonology and grammar), a collection of translated and annotated texts, and a dictionary.