The story is told by Mary herself, in the form a journal. It gives the reader an idea of what life would have been like in the 1600s - the mistrust, the fear, the paranoia. Plus it doesn't paint the Indians as the bad guys, which is always a plus for me.
It's meant for young adults so it has a certain nice innocence to it. I enjoyed it, although found it a bit overly simplistic at times. But hey, it's not meant for my age group!