Summary: The essays by Martin Haug present the results of his research on Zoroastrian Sacred Writings and Religion. Haug aims to provide a readable account of the Parsees' scripture and religion, offering grammar outlines to facilitate learning of their sacred language. The Roman alphabet is used throughout, and Haug expresses gratitude to his subscribers for supporting his work. The text delves into the historical exploration of knowledge about Zoroastrianism by Western nations, emphasizing the importance of comprehensive research. It highlights the unique language challenges of the scripture and calls for philological explanations to unveil the creed's enigmas. The work also addresses the role of Dustoors and scholars in shedding light on Zoroastrian texts, reviewing various translations and historical accounts by scholars like Anquetil and Tiele. Researches in Europe demonstrate a growing interest in unraveling the mysteries of the Zend-Avesta, advocating for deeper understanding and appreciation of this ancient belief system.