Esther tells, with the pace and structure of court drama rather than prophecy or law, how a Jewish woman becomes queen of Persia and uses her position to save her people from a planned genocide engineered by the royal official Haman, who plots the extermination of all Jews in the empire after Esther's cousin Mordecai refuses to bow to him.
The story turns on reversal at every level, Haman's gallows built for Mordecai becomes his own execution site, the day set for the Jews' destruction becomes instead the day of their deliverance and their enemies' defeat, and Esther herself moves from a passive candidate in a royal beauty contest to the decisive actor who risks her own life, "if I perish, I perish," by approaching the king unsummoned to expose the plot. The book is unique among all sixty-six books of the Protestant Bible in never mentioning God directly even once, a genuinely striking textual fact scholars and readers have long noticed, met by centuries of interpretation finding divine providence at work precisely through the story's remarkable coincidences and reversals rather than through any stated miracle. The book closes by establishing Purim, still celebrated today with public reading of the scroll, costume, feasting and gifts to the poor, as a permanent commemorative festival, making Esther unusual among biblical books for directly instituting the holiday built around it.