The Book of Esther Has a Ciastic Structure

The book of esther has a ciastic structure, which refers to hebrew poetry and story telling. Chiasm is a kind of reverse parallelism. Instead of a poem that repeats its ime in an a b, a b, structure, archiasm reverses its structure in the literary equivalent of an hour glass. It's a structure that goes in and then returns back, covering the same points on the way out that it did on the way in. And so you can find lots in literature, lots of of these kind of small casms, just in the way that people speak.