I was at the library, and I checked out a book called Sister Wife, by Shelley Hrdlitschka. This is a book based on the fundamentalist LDS movement. The families in it are part of The Movement, and they live in a city called Unity. They never leave the city. In fact, the only person who leaves the city is Celeste's father and one of his wives. They leave once a week to go shopping because they feel bringing other people or too many people will draw questions to them and their lifestyle.
Celeste is one of the main characters in the novel. As the story starts, she is just shy of her 15 birthday. This is the age at which girls in the community get married to much older men. They go to school until they are roughly 14.
Celeste is sort of "rebellious," so to speak. She does not want to marry an older man. In fact, she is not even sure she wants to stay in Unity.
The plot follows her thoughts and actions, as well as looking at what she does through the eyes of her sister and her friend. Overall, for a book written for younger teens, this is a pretty good read, and I recommend it.