In his three-book exploration of signs and synapse, Jacques Chevalier explores the links between brain science, studies of symbolism, and debates in ancient, modern, and postmodern philosophy to shed light on how brain and signs in language actually interface. In The 3D Mind the author pursues this dialogue across disciplines through an elegantly simple plan that mirrors the three-dimensional structure of the brain, proceeding from the saggital (right-left) to the axial (top-down) and the coronal (front-rear) dimensions of neuropsychology.