F-M Facial Expression of Emotion Theory (F-MFEET) illuminates the intricate ways in which our facial expressions convey a wide spectrum of emotions, serving as a universal language understood by all, transcending cultural and linguistic barriers, defends Prof. Freitas-Magalhães, the world's leading expert for Neuroscience and Biobehavioral Psychology and the Encyclopedia of Human Behavior, by Elsevier, Oxford, in his pioneering and extraordinary book.