Deuterocanonical Books of the Bible is a collection of ancient texts included in the biblical canon of some Christian traditions, composed during the late Second Temple period. These writings encompass a variety of works such as the First and Second Books of Esdras, the Book of Tobit, and others, which explore themes of faith, morality, and the historical experiences of the Jewish people. The compilation begins with the First Book of Esdras, which recounts key events during the reign of King Josias of Judah, focusing especially on the celebration of Passover. The narrative describes the detailed preparations undertaken by priests and Levites to observe this sacred festival, underscoring the importance of adherence to the Mosaic commandments. King Josias is portrayed as a devout and righteous ruler who leads the offering of numerous sacrifices in an effort to restore proper worship in Jerusalem. These foundational themes set the tone for the spiritual, ethical, and political narratives that run through the deuterocanonical books, offering valuable insight into the religious life and struggles of the Jewish people during this formative historical period.