Thank you very much for you suggestions Professional Tourist.
I will definitely try to check out those books. Also, thanks for sharing the article. Aggie did have so much versatility and was incredibly talented. She was also very beautiful, which I don't think everyone recognized. Thanks for sharing your review of the other book as well. It's also great to know what books not to read, especially when they are written with such antipathy and errors of fact that this book seems to be.
Are there any other resources you would reccommend that cover more of her as a person or her personal life? (I know she was very private.)