This has to be the most comprehensive and well researched history of the Battle of Britain available read and I've read several. Bungay concentrates less on the personal stories of the pilots, although many are included, and more on the guts of the Battle. Everything is here from the causes through strategy and tactics to the commanders at all levels and the combatant organisations. Every aspect of the Battle is here including pilot training, aircraft evolution and comparative capabilities. The rivalries within the air forces and the questionable decision making on each side is examined. Each encounter is documented by German Geschwader, Gruppe and Staffel and by British Fighter Command, Group and Squadron. The interim and final results are assessed after sifting through all the claims of aircraft destroyed and targets hit. In the end the Luftwaffe lost 1887 aircraft and the Fighter Command 1023 from all causes. An indication of how decisive the Battle was is the statistic showing Luftwaffe fighter strength declined by 30% between August and December 1940 and German bomber strength by 25%. The human cost, the butcher's bill was 2698 German airmen lost to 544 Fighter Command, the imbalance explained by the multi-crewed German bombers versus the single seat British fighters. British Bomber Command, by way of comparison, lost 50% more than Fighter Command.
This is not a quick read, dense in places, but it would have to be considered an authoritative source for one of the iconic stories from World War 2. I consider this a must read for anyone interested in the Battle of Britain