"Europe at War" is intelligently broken into sections that cover different aspects of the conflict: one for "Civilians", another for "Politicians" and so on, such that by the end of the book the key events have been covered from different perspectives that overlay each other to provide a much more comprehensive and much deeper understanding than most histories or biographies written from a single standpoint.
The other key strength of this title is that it eschews the conventional belief held in the West that Hitler was defeated by the US, Britain, and members of the Commonwealth such as Canada. The reality, which is clearly and comprehensively laid out here by Norman Davies, is that the Western Front prior to June 1944 was effectively a side show, and that Allied efforts in North Africa, while core to our Western perspective on the war, were puny in comparison to the massive campaigns on the Eastern Front.
In reality, the Second World War was a monumental clash between two totalitarian titans, Nazi Germany and the Soviet Union. Equally brutal, equally set on total victory at any cost - and the costs were unimaginable.
By the end of the war the Western Allies were worn out, despite the fact that their contribution was a fraction of the USSR's, and had to accept Stalin's annexation of half of Europe, including the occupation of Poland, which was betrayed several times by her Western allies.
That is the uncomfortable truth of the Second World War: it was no simple victory.