The Book of Esther is a book in the Hebrew Bible and the Christian Old Testament. It tells the story of a Jewish woman named Esther who becomes the queen of Persia. When a royal official named Haman plots to destroy the Jewish people, Esther bravely reveals her identity to the king, Ahasuerus, and pleads for her people's safety. The narrative highlights themes of courage, identity, and divine providence. The book is celebrated during the Jewish festival of Purim, which commemorates the salvation of the Jewish people from Haman's plot. It emphasizes the importance of standing up against injustice and the power of faith.