Enrico G. Raffaelli is Professor of theHistory of Zoroastrianism at the University of Toronto. His research concentrates on the pre-Islamic phase of the Zoroastrian religion, with a particular focus on the study of the Avestan and Middle Persian literature.
It is indeed a fine philological inquiry and should become a standard reference work on that Avestan text among scholars of Iranian languages and of the textual tradition of Zoroastrianism Prof Jamsheed K Chosky, Indiana University, Fezana Journal