"You can't have depths without surfaces," says Linda Grant in her lively and provocative new book, The thoughtful Dresser, a thinking woman's guide to what we wear. For centuries, an interest in clothes has been dismissed as the trivial pursuit of vain, empty-headed women. Yet, clothes matter, whether you are interested in fashion or not, because how we choose to dress defines who we are. How we look and what we wear tells a story. Some stories are simple, like the teenager trying to fit in, or the woman turning fifty renouncing invisibility. Some are profound, like that of the...