I found these 9 books on Oprah.com that are being promoted as life changing books. I have read only one on the list; the historical fiction Tale of Two Cities by Charles Dickens. Powerful, powerful love story and tragedy. I absolutely loved it but it did not "clean up my life." Take a look at the list of characters in Tale of Two Cities.
How God Changes Your Brain is a book on the list of 9 that I would like to read.