Summer 1940, and the Swastika flies over a conquered nation. Fiction? Yes, but in this detailed and at times disturbing fictionalised analysis of those crucial weeks in the summer of 1940, Kenneth Macksay shows how the Third Reich could have spanned the Channel and conquered Britain. The nub of his analysis is that if the Germans had immediately followed up their military defeat of the BEF and the French armies in the North at Dunkirk, with a swift Channel crossing, they would have found the British had very little with which to effectively oppose them. Even at the time Churchill admitted as much - he recognised that June/July was the most dangerous time for the British. The reasons that this didn't happen are several. The main one is that historically, Hitler, was always in two minds about whether to actually launch an invasion -- as recent work by some leading German historians has shown. Unlike his other offensives, with Seelowe, he was always more diffident. It seems he may just have been going through the motions, hoping that the British would "see sense" and strike a deal. Only if the political initiatives failed - coupled with the pressure of Luftwaffe raids and attacks on the RAF (the Battle of Britain) - would he then give the go ahead for Seelowe or Sealion - the actual invasion. In historical terms this means the invasion was always going to happen -- if at all -- in September -- and by this time there had been a significant re-equipment of those British (and Canadian) divisions which would bear the brunt of the invasion forces. Added to this the Channel weather worsens in September, and the German invasion fleet of barges was exceedingly vulnerable to anything above a 4 knot wind. But back to Kenneth Macksay's book. He quite rightly points out that any early invasion in July, would have relied heavily on the German 7th Parachute Division, and the 22nd Airlanding Division. Yet the 7th had been heavily used in the invasions of the Low Countries, and many of its frontline battalions (as well as Luftwaffe transport squadrons) were in no shape to carry out an early invasion of Britain. It's the only flaw for me in the book -- but if you do wonder if the Germans could ever have prevailed, and whether we would all now be living in a Thousand Year Reich, then read this -- and be glad that we're not.