Most books on the story of Esther focus on the deliverance of the Israelites from the law of the Persian king – masterminded by the evil Haman. Your novel however, stretches the story of deliverance to the eventual release of the Israelites from their 70 years bondage. Give us some insight on how you arrived at this.

It had to do with the timing of Esther’s story. She lived in a period that God had earmarked for a purpose. Taking Esther’s story out of that timeline, and the prophesied 70 years bondage of the Israelites was just not possible.
She got married to the king as a young maiden and at a time when Israel had already borne half of the prophesied bondage years.

The Bible confidently states that during the third year reign of King Darius he took over Babylon and three years after, he searched for a queen. There were twelve months of purification for the young virgins. By the seventh year, Esther was married to Darius. (Dake’s Annotated Reference Bible).

While recorded Persian history is eclectic, recorded Babylonian history is somewhat stable. I began the story plot from the Babylonian angle, with emphasis on the chronological facts. It is a fact that Nabopolassar ruled Babylon till 605BC. I therefore, did the extrapolation of the seventy years servitude from the time of Nebuchadnezzar’s invasion of Jerusalem (Dan. 1:1-2).

The fact is that Esther was the young and beautiful wife of Darius the Mede of Dan 5; and the mother of Cyrus, the commander of the Persian Armies which took Babylon at the end of the 70 years servitude. This Darius (the father of Cyrus) reigned 35 years, 33 of which were during the later part of the 70 years of servitude of Israel to Babylon. This fits into all the historical facts about Mordecai being carried away captive with Jehoiachin as a very young man. It was possible that he lived through the entire captivity. He could easily have been the Mordecai of Ezra 2:2, Neh 7:7. Some of the Jews did live through the servitude and returned to see the foundation of the temple laid. (Ezra 3:12)- Dake’s Annotated Reference Bible (Page 851 c2, 1999 Large Print Ed).
That Cyrus is Esther’s son is a revelation of great enormity, particularly, as his name is splattered in prophesies, as the one who would bring an end to the years of bondage.

About 200 years before the birth of Cyrus, Isaiah the Prophet spoke out of Palestine saying: That saith of Cyrus, He is my shepherd, and shall perform all my pleasure: even saying to Jerusalem, Thou shalt be built; and to the temple, thy foundation shall be laid.- The Prophet Isaiah and Jerusalem (8th – 7th Centuries BCE);

http://jeru.huji.ac.il/eb331.htm .