History of the planned but never-attempted German invasion of England, especially of the English preparations to meet it. Aims to disprove the ideas that Operation Sea Lion was a bluff, and that the British were unprepared for invasion. Argues that British preparations for the invasion were much more serious and thorough than the German preparations, and even had the Germans won the air Battle over Britain, the planned invasion would have still probably failed. Very readable, relies on quotes more than numbers. I felt the use of Churchill's taking meetings even in the bath as an example of how fevered the planning was during the darkest days of 1940 was incorrect, because taking meetings while he bathed was part of Churchill's routine for many years before WW2; he was just weird. An interesting story the book told was of the British planted rumor in the NY press that a German invasion attempt was actually made, but that it's only result was thousands of burned bodies washed up on the shores of the English Channel. Reading this book, I couldn't help but conclude that rumor was probably an apt prediction of the result of Operation Sea Lion would have been had it gone forward.