Book excerpt: Annotation The second volume of this book series on the modern practice of Chinese medicine continues with the focus on evidence-based TCM research. It is even more focused than the preceding one ? providing detailed information about the best sources of herbal supply required for research and drug development purposes. Herbal supply has always been a major concern for TCM researchers because it is difficult to ensure that the supply is of the best quality. Another highlight of the book are the special reviews on the state of Good Agricultural Practice