Bloganuary 10: Has a Book Changed Your Life?

As an avid reader, this question is sort of like, DUH! to me. But I also have to remember, not everybody reads and thinks like I do. At the same time, trying to think of a specific book was not ringing any bells. I sort take away something from almost every book I read but there are a few books that I have read that I literally have notes for in a notebook because they made me sit and think about my life. I mostly read black indie romance books (as chronicled right here on the blog) but these 5 books were the ones that made me step out of my comfort zone in order for me to grow as a human, a woman, and as a Christian.
Who Moved My Cheese & Out of the Maze by Spencer Johnson, M.D.
What, if any, book(s) changed your life?