Although 50 years have passed since the end of World War II, there has as yet been no definitive history of that conflict. Existing histories have raised as many questions as they answer: Did Roosevelt have foreknowledge of the attack on Pearl Harbour? Could the Allies have invaded France before 1944? Might bombing the Auschwitz railway have impeded the course of the Holocaust? John Keegan here assesses the literature that has emerged from World War II - and the controversies it has generated - in a book that combines stunning erudition with crisp prose and highly personal discernment.