Book excerpt: This WWII history examines how the Royal Navy defended the English Channel from the first Dover Patrols to the liberation of the Channel Islands. The English Channel has always provided Great Britain with a natural defensive barrier, but it was never more vital than in the early days of World War Two. This book relates how the Royal Navy maintained control of that vital seaway throughout the war. Military historian Peter Smith takes readers from the early days of the Dover Patrols, through the traumas of the Dunkirk evacuation and the battles of the Channel convoys; the war against the E-boats and U-boats; the tragic raids at Dieppe and St Nazaire; the escape of the German battle-fleet; coastal convoys; the Normandy landings and the final liberation of the Channel Islands. Many wartime photographs, charts and tables add to this superb account of this bitterly contested narrow sea.