'Nobody needs reminding of the significance of Heidegger's Being and Time. Although it was an early unfinished work of his, it has always been regarded as one of the central texts of twentieth-century philosophy. Moreover, there is still much to be gleaned from it. It is therefore entirely fitting, as we approach the centenary of its publication, to issue a companion of this kind. The quality of the contributors and the range of questions that they address are more than equal to the task. They help us not only to appreciate what Heidegger is saying to us in this masterpiece, but also to appropriate it. That seems to me to be one of the hallmarks of the best history of philosophy.' A. W. Moore, St. Hugh's College, Oxford