Is there a difference between Series II of Introduction to TCM and Introduction to TCM?

There is no difference. Introduction to Traditional Chinese Medicine is a book published by People's Health Publishing House in 2006. The writer is Qin Bowei. According to the system of traditional Chinese medicine, the book is divided into four parts: theory, law, prescription and medicine. The second series of Introduction to Traditional Chinese Medicine also divides the content into four parts: principle, method, prescription and medicine, and describes the basic theory, physiology, etiology, diagnosis and treatment of traditional Chinese medicine in turn, as well as the composition and application of prescription and medicine. There is no difference between the two. These two books describe in detail the medical characteristics of TCM "syndrome differentiation and treatment" and can be used as introductory reading materials for beginners of TCM.