Prasun (Wasi, Paruni) has long had a reputation for being the most aberrant of the Nuristani group of Indo-European languages. Only after the publication of a considerable number of Prasun texts in 2016 as volume 80 in this series has it been possible to analyze the language based on the solid foundation of a large text corpus. Georg Buddruss collected the source texts in the Prasun Valley in 1956 and 1970. That edition comprises texts in several dialectal varieties of Prasun.

The present volume is the outcome of extensive work on this text corpus. It is the first comprehensive grammar of Prasun as well as the most detailed description of any Nuristani language yet published. Among the topics addressed in this volume are: morphology, verbal categories, subordination, relative clauses, mirativity, verbal particles, and the complicated system of directional morphemes. This grammatical analysis is amply supported by quotations from the text volume. This book is a major contribution to studies of Nuristani and other languages of the Hindukush-Karakoram region.