Volume IV of the Sacred Books of The East series, this is Part 1 of the ancient Zoroastrian text, the Zend Avesta and this part covers the Venidad. In the introduction, you can read about the discovery of the Zend Avesta, the interpretation, the formation and the origin of it, and the Avesta religion. The book then moves on to the actual translation by James Darmesteter of the sacred text.
Source and copyright Global Grey Ebooks: https://www.globalgreyebooks.com/index.html. The book can be downloaded from the Global Grey website.