The Pahlavi Yasna of the Gāthās and Yasna Haptaŋhāiti is a critical edition of the Pahlavi text, with citations of parallel passages in the Dēnkard, accompanied by a complete glossary and an introductory text-critical treatment of the text. Also provided is a parallel Avestan and Pahlavi text designed to portray the near word-by-word dependence of the gloss on the original Avestan. Owing to the very nature of the Pahlavi gloss, which itself is not a translation, no English translation is attempted.