This is a book about the visual perception of all the things we encounter in our daily lives. To that end, it is a book about everything you already know first hand, such as the beautiful glow of a baby's skin, the lush green of a well-watered lawn or the shimmering glean of your favourite drink in a frosty glass. In casting light on these things you already know, it’s also a book about everything you’ve likely never even thought about: namely, how does the brain make sense of all the nuanced variations in the patterns of light reaching our eyes in a way that allows us to even speak of these everyday things. It is thus a book about how our brains reduce the immeasurable complexity of these light patterns down into the consumable chunks of knowledge that we call everyday things. In short, this is a book about the miracle of visual perception.