The Secret?

so apparently there's this book and a movie about this "secret" which turns out to be something called the law of attraction, which is that your thoughts and the things you visualize will come to you, regardless of what you feel about those thoughts. It seems that this is a method that can be used to alter one's life and bless people with happiness, or so it very grandly describes on the website. Thought it would be something interesting to look into and was wondering if anyone happens to know anything about it