For practitioners of Chinese medicine I recommend Jason Robertson’s Applied Channel Theory in Chinese Medicine: Wang Ju-Yi’s Lectures on Channel Therapeutics.
The beginning of the book focuses on theory: specifically, the relationship between the individual organs (and their functions) and the channels. The format is easy to read, with beautiful illustrations that succinctly depict the often complex and detailed Chinese medicine theories. Each chapter includes a follow-up question posed by Jason to his teacher, Dr. Wang Ju-Yi. It reminds me of the question-and-answer format of the Huang Di nei jing (The Yellow Emperor’s Inner Classic), in which Huang Di poses the question and Qi Bo answers.
The second portion of the book discusses channel theory. I especially appreciate this section because it stresses ways to apply the theory directly to your clinical practice. I use applied channel theory in addition to asking questions, checking the pulse, looking at the tongue, and palpating the abdomen. Applied channel theory is yet another diagnostic tool for me to use to come up with an appropriate treatment plan for my patients.
Here’s a sample pdf from the book.