Richardson explores the famous turn (Kehre) in Heidegger’s thought after Being in Time and demonstrates how this transformation was radical without amounting to a simple contradiction of his earlier views. In a full account of the evolution of Heidegger’s work as a whole, Richardson provides an illuminating account of both divergences and fundamental continuities in Heidegger’s philosophy, especially in light of recently published works. Including as a preface the letter that Heidegger wrote to Richardson and a new introduction by the author, this book remains a useful guide to the philosophy of Heidegger.