Some textbooks have concentrated on being as comprehensive as possible, with a chapter covering key ideas in each of the relevant disciplines – a chapter on psychology, a chapter on neuroscience, and so on. These books are often written by committee – with each chapter written by an expert in the relevant field. These books can be very valuable, but they really give an introduction to the cognitive sciences (in the plural) rather than to cognitive science as an interdisciplinary enterprise. Other textbook writers take a much more selective approach, introducing cognitive science...