I would suggest The Law of Success by Napolean Hill is better than Think and Grow Rich, for Think and Grow and Rich is a watered down version of it. There is much more in the Law of Success about the subject. You can download the Law of Success as audio I believe.
For audio, you could try and lay your hands on a copy of The Power of Intention by Wayne Dyer. It is also in book format, but the audio is excellent. In fact, after listening to The Power of Intention (which is 4 CD's) I exclaimed it was the best audio production explaining the law of attraction I had heard.
Also, the first person to introduce me to the idea of the Law of Attraction, was back in the early 1990's, was a brilliant Australia author named Michael Domeyko Rowland. He is simply fantastic and explains things beautifully and is easily a leader in the field (I also believe he is producing a new movie on the subject as he used to be a prominent film director in Australia). He offers some of the best work on the subject in the field. But, you have to order and wait, I don't think you can download from him. Check his Law of Attraction CD's out here on his official site:
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