Professor Wistrich has now written some 30 scholarly books on Jewish history and philosophy, but his work has been dominated by the subject of anti-Semitism. This book is his finest and most comprehensive on the subject, surpassing even the masterful Antisemitism: The Longest Hatred. It is lengthy and intensive and assumes a knowledge of Jewish history and philosophy probably not available to the general reader. But anyone willing to give this book the time it needs to be fully appreciated will be rewarded. From Ambivalence to Betrayal is a warning we can no longer afford to ignore. Anti-Semitism, driven underground by Kristallnacht and Auschwitz, has returned to the mainstream of Western politics. Our generation will be judged by the speed and mettle of our response, just as our fathers' and grandfathers' generations were damned by their failure to act until after the gas chambers had done their worst.