A great book to learn about Garance Doré. This is more of an autobiography, than a style book. It’s somewhat personal. She talks about her life and describes philosophies that have worked for. You will learn more about Garance than you will about style.
I've seen face after face light up with surprise and interest when I say that I'm a fashion designer. I have a good sense of what my new friend thinks I do, what I actually do, and the massive divide between those two points.