It looks so easy. Open your eyes, and immediately there is a world of objects in glorious Technicolour. It takes no time or effort - perception just happens. Or does it? Is it really that simple? As this book discusses, the more that has been discovered about the senses and the brain, the morewe know that seeing, hearing, smelling, touching, and tasting depend on incredibly complicated physiology. Although we seem to experience objects quite directly this is not so: the brain still has to work out what is out there. It doesn't always guess right, then we have an illusion - striking andinteresting happenings of the mind.This book is about the phenomena of perception. The first chapter covers the evolution of the sense organs, including Darwin's initial reluctance to accept that natural selection could have 'designed' structures as complicated as eyes or other sense organs. Chapter 2 explains how perceptionactually works, and in particular how the brain interprets perceptual information. Chapter 3 focuses on the phenomena of illusions as keys for unlocking secrets of perception. The final chapter looks at the special case of pictures such as drawings and painting and how the brain interprets them asrepresenting objects.This is an intriguing and engaging account of how we perceive the world around us.