Book: Esther
Author: possibly Mordecai, or Ezra or Nehemiah
Date: 470 B.C.
Genre: Narrative
Summary: Esther shows God's providence at work in a profound way. As one Persian noble plotted to kill the Jews, Esther, a Jew and also the queen, interceded on behalf of her people at great personal risk.

From Wikipedia, English
Ahasuerus" is given as the name of a king, the husband of Esther, in the Book of Esther. He is said to have “ruled over a hundred and twenty-seven provinces from India to Nubia" — that is, over the Achaemenid Empire. Some consider the narrative of Esther was to provide an aetiology for Purim, and that the name Ahasuerus is usually understood to refer to Xerxes I, who ruled the Achaemenid Empire between 486 and 465 BC. Outside of the book of Esther, history records that Xerxes was married to Amestris, not Vashti or Esther. Moreover, it is understood that Persian kings did not marry outside a restricted number of Persian noble families. In the Septuagint, the Book of Esther refers to the king as 'Artaxerxes,' who was the younger son of Xerxes (Ancient Greek: Ἀρταξέρξης).

From Gotquestions, Nederlands
Het boek Ester