Henry B. Lin - Art and Science of Feng Shui
This is most definitely one of the very best books written in English on feng shui. Lin quotes directly from the ancient Chinese feng shui texts. Get this book! Read this book!
"...feng shui is not a set of fixed rules. Instead, it is a body of principles, which willingly lend itself to creative interpretation and application by its students."
Lin refers to the Form School as the Situation School which is in itself incredibly insightful.