I cannot recommend this book highly enough. The author, a doctor, is not trying to sell you anything except the ability to live cancer-free or in remission. You do not have to purchase anything except the book, and no matter how much you think you know about preventing cancer or dealing with it, you are bound to learn something from this book. If you have cancer, the author tells you to take advantage of everything that modern medicine has to offer, but he also advocates lifestyle changes in diet, exercise and attitude to hopefully prevent cancer in the first place, or if you have it, cause it to go into remission. And he substantiates everything he says with valid scientific studies. The author is an excellent writer and has written an inspiring autobiography, Not the Last Goodbye, which I also highly recommend.