The 13 chapters of this volume represent a selection of the papers presented at the “Third International Conference on Iranian Linguistics”, held in September 2009 at the Université Sorbonne Nouvelle in Paris. This series of conferences brings together scholars from all theoretical persuasions has established a tradition of interdisciplinary linguistic research on Iranian languages. This volume represent the dynamic and rapidly growing nature of Iranian linguistics, a field which has united linguists of all persuasions who share a strong commitment to the scientific investigation of Iranian languages, their structure, history and use.