The most iconic planes of WWII, the Supermarine Spitfire, Hawker Hurricane, DeHavilland Mosquito and the Avro Lancaster, were all powered by one engine, the Rolls-Royce Merlin. The story of the Merlin is one of British ingenuity at its height, of artistry and problem-solving that resulted in a war-winning design.

Published to coincide with the 80th anniversary of the start of the Battle of Britain, Merlin is the extraordinary story of the development of the Rolls-Royce engine that would stop Hitler from invading Britain and carry the war to the very heart of Germany.

The story of the Merlin engine encompasses the history of powered flight, from the ingenuity of the Wright brothers to the horrors of World War I and from the first crossing of the Atlantic to the heady days of flying in the 1920's. There is also the extraordinary story of the Schneider Trophy - an international contest wherein nations poised on the precipice of war competed for engineering excellence in the name of progress.

And at the heart of this story are the glamorous lives of the pilots, many of whom died in their pursuit of speed; the engineers, like Henry Royce of Rolls-Royce, who sketched the engine that would win WWII in the sand of his local beach; and perhaps most importantly the Lady Lucy Houston who after the Wall Street Crash single-handedly funded the development of the engine and the iconic Spitfire.

Never was so much owed by so many to so few - and without the Rolls-Royce Merlin engine, the few would have been powerless.