In LeDoux and Freitas-Magalhães: The Emotional Brain and the Facial Brain, a scientific dialogue is established between two fundamental theories of emotion. From Joseph LeDoux's Emotional Brain, the book shows how neural circuits detect danger and initiate adaptive responses before consciousness. From A. Freitas-Magalhães´Facial Brain it is demonstrated that those responses extend on the face as observable muscle patterns. Emotion is presented as a neurobiological and neuroexpressive process, prior to conscious feeling. The text integrates subcortical evidence, facial expression and cultural regulation. Fear emerges as a central model of analysis. Scientific coding makes emotion measurable and comparable. The book goes beyond the emotion-reason dichotomy. Proposes a unified Brain-Face-Emotion model. It thus inaugurates an integrated neuroscience of human emotion.