Book excerpt: The aim of this book is both to reflect current knowledge of perceptual development and to point to some of the many questions that remain unanswered. The study of perceptual development is now a sophisticated science. The majority of the chapters tell a fascinating detective story: the way in which infants perceive and understand the world as they develop. Each of the major sections is prefaced by introductory comments, and the book will be useful for advanced undergraduates, postgraduates, researchers, and other professionals who have an interest in early perceptual development and in infancy in general.