The Secret by Rhonda Byrne

Once known only by an elite who were unwilling to share their knowledge of the power, 'the secret' of obtaining anything you desire is now revealed by prominent physicists, authors and philosophers as being based in the universal Law of Attraction. And the good news is that anyone can access its power to bring themselves health, wealth and happiness.
The law of attraction states that whatever you experience in life is a direct result of your thoughts. It really is that simple. If you think about being fat, you will get fatter. If you think about thin people, you will become thin yourself. If you think about your bills, you will get more bills, but if you think about cheques instead, your mailbox will overflow with them.