As an exploration of the interpretational issues that eddy around the Third Reich, Ian Kershaw's The Nazi Dictatorship has become a classic account. But if its core remains unchanged, its contents must necessarily reflect both new public controversies and the onrush of fresh research. In the fourth edition there are many changes of detail to accommodate this need and substantial rewritings of two chapters. No subject among those dealt with in earlier editions has been the subject of such intensive research - and bringing such rapidly changing interpretations - as `Hitler and the Jews' and, accordingly, that chapter has been considerably changed. The book's final chapter has also undergone significant revision, to take account of the `Goldhagen phenomenon', and to glance back over the changing trends of research on the Third Reich as, with the passing of the generations, Hitler and his regime themselves pass into history.