What One book that changed your life?

Question:

What One book that changed your life?

Best Answer - Chosen by Asker: "Story of a Soul".. the Autobiography of St. Therese of Lisieux by St. Theresa.
The book is actually written by St. Theresa before her death in 1897 under obedience by her Mother Superior
I have read it so many times. It makes you understand God's Love for us and what He will do for us his Children.
The Saint's great Love for God was so awesome, for it was in the little everyday, ordinary things that she showed her love best and attained Holiness and Sainthood.
Made me stop and think that we too can achieve holiness like St. Theresa, not by doing great things, but by doing small things in a great way... with LOVE.
I try to remember every day, that just by being the best I can be, where ever I am, and doing all the little things in my life with love, I do can make the ordinary, extra-ordinary, like St. Theresa.