According to many scholars, the book of Esther was written possibly by Mordecai or Ezra or Nehemiah around 470 B.C. Esther is one of only two women for whom books of the Bible are named. Her name means star. Interestingly, the name of God appears nowhere in this book. 

There are many lessons to be learned from the book of Esther.

Here’s a lesson I (Patti) learned.
Esth 4:14b
And who knows but that you have come to royal position for such a time as this?" 
Several years ago, this verse was brought to my attention and a thought was planted in my mind. No matter where we are or what the circumstances are, we must believe that God has placed us exactly where He wants us to be. And, we must be ever watchful for opportunities to make a difference. How about you, have you been placed in a position “for such a time as this?"

Remember, we have often made this statement - Never underestimate the power of ONE!