""A Hymn of Zoroaster: Yasna Thirty-One"" is a book written by Abraham Valentine Williams Jackson and published in 1888. The book is a translation of a hymn from the Zoroastrian scripture, the Yasna, which is believed to have been composed by the prophet Zoroaster himself. The hymn is a prayer to the god Ahura Mazda, asking for protection and guidance in life. The book includes the original text in Avestan, the ancient language in which the Yasna...