Creating Money: Keys to Abundance by Sanaya Roman & Duane Packer (1: Spiritual & channeled!)

This is an excellent resource and is spiritual, even though it uses the word 'money' in the title, it is not actually about money but about creating abundance in one's life, which is a much, much broader concept.

The Secret by Rhonda Byrne (2)

In this book, you'll learn how to use The Secret in every aspect of your life -- money, health, relationships, happiness, and in every interaction you have in the world. You'll begin to understand the hidden, untapped power that's within you, and this revelation can bring joy to every aspect of your life.

NOTE: While this book holds A GEM, I would like to warn you that it's focused on money, and actually I have learned that money is easy to materialize. What's important is something else. Consider that now you have that million dollars in your bank acount; now what (are you going to do with your life)? Think about what you want to be, to accomplish and give back to the world holistically, and you'll be a step ahead on the road towards happiness! Money is merely matter. Joy is invaluable.