Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Could Hitleer have won?

Could Hitler have conquered Britain in 1940? How close was that country to sharing the fate of Occupied Europe?The common belief is that Hitler's failure to invade Great Britain in 1940 is inexplicable, and that the Battle of Britain was narrowly won, against overwhelming odds, by a very few British pilots.In Summer, 1940, Roger Parkinson, a leading military historian, has drawn on extensive contemporary accounts and on hitherto unpublished documentation, up to the War Cabinet level, for a new view of these controversial events of World War II, in a telling and atmospheric recreation of those four tense months of 1940.Other elements of special interest in Summer, 1940: Parkinson's account of the decision-making processes of the British and German High Commands; his descriptions of the actual battles for air supremacy; and new information on the air tactics of the Royal Air Force and the Luftwaffe.