The Birthright, by Loralee Evans

  This book takes place in the time of the famous Captain Moroni in the Book of Mormon. The main Character Miriam is forced to leave her home with the Lamanites when she is but a child with her baby brother tied to her back. Her Grandmother sends her to find the Nephites who will keep her safe from her father. The father who wants to sacrafice her to the Lamanite Gods.
  She eventually meets up with the Nephites when she meets Jacob, who saves her and her brother from a Jaguar attack. Older but not old enough to be a man Jacob and the Nephites he is traveling with find a loving home for Miriam and her brother (whom she names Jacob). Then they say their goodbye's.
  4 years later Miriam's adoptive parents are gone and she is left taking care of her brother again. This leaves her working for Morianton, an evil Nephite. When she refuses to move with him, he beats her. She was able to escape with her brother to a Nephite camp where she runs into Jacob, but they do not recognize each other. He  takes her to Captain Moroni's tent so she can speak to him about some important news on Morianton and his village.
  Meanwhile Jacob recognizes her and see's how much she has changed. While Miriam in her tired state still doesn't know who he is.

  If you want to find out what happens next, go find the book and read it! I promise you will enjoy it! It has Romance, Drama, Action, Friendship, Trust. Everything you could ever want. It has also got some famous people from the Book of Mormon in it, and it feels like you are right beside them during some epic moments.
  I hope this inspires you to start reading this book. It has got to be one of my all time favorites. As you will find out I enjoy reading time period books. So keep a look out!