It is striking that, although philosophers have theories about the values of truth, goodness and beauty, they do not provide an account of the value of depth, which is also frequently referred to in our everyday evaluative discourse. In Depth, Melissa Zinkin provides one of the few philosophical accounts of depth. Moreover, she does this through a new interpretation of the philosophy of Immanuel Kant. By showing that Kant was in fact arguing for this unique and important value, Zinkin shows how Kant is still relevant to contemporary philosophical discussions of value. Indeed, Kant's philosophy has much to offer anyone today who is critical of superficial or shallow thinking.