5 books that changed your life?

livros
Reading the comments on my post The 50 books that changed the world , I think it is a good idea to ask the following question, so you can share with others:

5 books that changed your life?
5 livros que mudaram sua vida?
5 libros que cambiarán tu vida

List them in the comment box below (tu lista abajo / sua lista abaixo )