Nina Garcia sure knows what she's talking about. She gives the best definition of style in this little book beautifully illustrated by Ruben Toledo. She provides a solid foundation that will help you to develop your very own style though the hard work is left to you (and there's a lot that has been left aside eg colours and bodyshapes).
It may take some time but once you've figured it out, it's one of the most exciting journeys of life. What I particularly liked in this book is the link to art and all the unexpected places where you can find inspiration. The secret lays in a few words: Make it your own.
The things I liked least about the book is chapter 4 called 'what to wear when' that I found somehow useless because most of us already have a sound idea of what to wear when going to a wedding or a job interview, this is just common sense that didn't need a full chapter in my opinion. I would have expected more development on what to wear according to the seasons or the weather as I often find switching from one to the other a bit challenging.
The chapter containing the basics are fairly known already and despite I agree the little black dress is a must, black is not a colour that suits everybody as well as for ballet flats. So I'd say don't follow everything in the book to the letter but give yourself a good look in the mirror and decide whether some of these basics are for you or not. You may find other basics that totally work for you (as for myself it's tights, boots and berets). Some contradictions too: She mentions that it's not about money (which is true) though she makes many references to top designers throughout the book. As much as I appreciate luxury, we all know that the majority of us will never be able to afford these unless they save for months if not years.