This book formed the basis for the movie "Battle of Britain". After reading the book, this connection was very clear. A virtually day by day summary of the battle from the British side was detailed. While this got somewhat repetitous it was not really difficult reading. The most interesting section was titled "Both Sides Prepare" which detailed the years leading up to the 1940 start of the battle. The advent of Radar by the British and aircraft development from both sides gives one an excellent historical perspective on what was to come. The "phony war" period after the fall of France is covered in good detail. The actual battle from July to October, 1940 is covered in detail--sometimes too much detail, but one does get a taste of the day to day operations of the Royal Air Force in action. The maps included in my paperback edition were not really readable, so I recommend finding a hard back copy if you can.