Book excerpt: "What stopped Hitler in 1940 - why did he not attempt to invade Britain? And if he had, would he have been successful? Most of us would answer that "The Few" of Fighter Command saved Britain from certain invasion, because every historian of World War Two, from Winston Churchill onwards, has said so. Yet in this fresh look, Derek Robinson argues that the Battle of Britain alone could not have been why Operation Sealion, the planned German invasion, was scrapped. The greater obstacle was a force that both Churchill and Hitler failed to acknowledge." "Robinson suggests that most accounts of 1940 are written as if the Channel and the Royal Navy did not exist. In fact, an inadequate German fleet was relying on the use of 1,000 flat-bottomed barges as landing craft - which even in a flat calm would have taken ten days to effect the complete landing. These cumbersome vessels would also have been sitting ducks for the Royal Navy, which at that time was still massive - 70 to 80 destroyers were ready and waiting in home waters." "The skill and courage of the Spitfire and Hurricane pilots who fought the Battle of Britain are not in question, and Robinson never downplays the extent of their sacrifice - he is the author of many acclaimed books depicting the lives of fighter pilots in both world wars. Here he challenges a verdict that has been in place for 50 years and his views will be unwelcome to some. But as well as relating the Battle of Britain with his trademark realism, Robinson now presents clear evidence to make us question our easy acceptance of the old story."--BOOK JACKET.