Feng Shui is about living in harmony with your environment.
This book is an introduction to feng shui principles and how they can be applied to your garden. Your garden does not have to be a Japanese- or Chinese-styled garden for these principles to be used. Any garden should be healthy, balanced, and have the elements interact with each other in a harmonious way.
This book describes the principles and features related to feng shui. Each topic is described and often illustrated on one or two pages, thus leaving some readers wondering why there isn't more detail. But if you think of this as an introductory book, you will at least know what the principles are that you may be missing in your garden. Once you know what you don't know, then you can go else where (even online) to learn more about it.
My favorite example in this book is on page 26, where "Shape and Color" is described. The front of a home is shown where the garden has way too many strong colors and all the flowers look like little balls of color. It does not even look comfortable to walk by that house with all the colors jumping out.