This volume is a collection of forty articles dedicated to one of the most distinguished contemporary iranists, Nicholas Sims-Williams, on the occasion of his sixtieth birthday on 11th April 2009. It includes an essay on Sims-Williams' outstanding contributions to Iranian studies, especially Sogdian and Bactrian, a list of his publications, editions of various texts written in Sogdian, Khotanese, Parthian, Middle Persian, and Avestan and articles on Old Persian, Middle Persian, New Persian, Bactrian, Balochi, Tati, Judeo-Persian, Caucasian, Uighur philology, linguistics and iconography. The book is illustrated by numerous plates. From the table of contents (40 contributions) A.D.H. Bivar, The Rukhkh, Giant Eagle of the Southern Seas F. de Blois, A Sasanian Silver Bowl A. Cantera, On the History of the Middle Persian Nominal Inflection C.G. Cereti, The Pahlavi Signatures on the Quilon Copper Plates (Tabula Quilonensis) J. Cheung, Two Notes on Bactrian I. Colditz, The Parthian Sermon on happiness J. Elfenbein, Eastern Hill Balochi H. Falk, The Name of Vema Takhtu P. Gignoux, Les relations interlinguistiques de quelques termes de la pharmacopee antique.