Video from SUNGSOOTV
"Author: The Book of Esther does not specifically name its author. The most popular traditions are Mordecai (a major character in the Book of Esther), Ezra, and Nehemiah (who would have been familiar with Persian customs).
Purpose of Writing: The purpose of the Book of Esther is to display the providence of God, especially in regard to His chosen people, Israel. The Book of Esther records the institution of the Feast of Purim and the obligation of its perpetual observation. The Book of Esther was read at the Feast of Purim to commemorate the great deliverance of the Jewish nation brought about by God through Esther. Jews today still read Esther during Purim.
Esther 2:15 - Now when the time came for Esther to go to the king, she asked for nothing other than what Hegai, the king’s eunuch who was in charge of the harem, suggested.
Esther 4:14 - For if you remain silent at this time, relief and deliverance will arise from another place, but you and your father’s family will perish. And who knows but that you have come to the royal position for such a time as this.
Esther 6:13 - Since Mordecai, before whom your downfall has begun, is of Jewish origin, you cannot stand against him - you will surely come to ruin!
Esther 7:3 - If I have found favor with you, O king, and if it pleases your majesty, grant me my life - this is my petition, and the life of my people - this is my request..." from the article: Summary of the Book of Esther