In late antiquity, Zoroastrian exegetes set out to translate their ancient canonical texts intoMiddle Persian, the vernacular of their time. Although undated, these translations, commonly known as the Zand, are often associated with the Sasanian era (224 651 CE). Despite the many challenges the Zand offers to us today, it is indispensable for investigations of late antique exegesis of the Avesta, a collection of religious and ritual texts commonly regarded as the Zoroastrians' scripture.Arash Zeini also offers a fresh edition of the Middle Persian version of the Avestan Yasna Hapta?h?iti, a ritual text composed in the Old Iranian language of Avestan, commonly dated to the middle of the second millennium BCE. Zeini challenges the view that considers the Zand's study an auxiliary science to Avestan studies, framing the text instead within the exegetical context from which it emerged.