"A Wrinkle in Time" by Madeleine L'Engle

I read this book a while back and I am not sure I remember exactly what it was about, but I know that it is a favorite of many of the teen community and so therefore, I place it here. I intend to read it again, and at that time I shall comment and give my official rating. In the mean time, please feel free to give ratings and comments of your own on this subject.