This collection of facsimile reprints brings together the most important recent scholarship examining the major stages in Heidegger's philosophical career. The first volume focuses on Heidegger's major work, Being and Time , as well as Heidegger's essays and lecture courses produced during the genesis of Being and Time, and shortly after its publication. The second volume covers the period from shortly after the publication of Being and Time up to the Letter on Humanism - that is, the period of Heidegger's notorious 'turn'. Volume three addresses the 'late' Heidegger: his thought from the 1940s until his death in 1976. It focuses on language and poetry, his renewed encounter with pre-Socratic philosophy, his development of the doctrine of the fourfold of earth, sky, mortals, and divinities, and his repeated attempts to radicalize his earlier accounts of Being and unconcealment. The fourth and final volume focuses on Heidegger's significance for contemporary issues in philosophy. Articles in this volume explore Heidegger's relevance to particular areas such as philosophy of mind and language, and relate Heidegger's thought to the philosophy of other contemporary philosophers like Wittgenstein, Searle, Davidson, Rorty, Levinas and Derrida.