1939. The battle for the skies of Britain has just begun. At the outbreak of the Second World War D. M. Crook, of No. 609 Squadron AAF, was at Yeadon, still undergoing his training; by the winter of 1939-40, he had his wings. Successfully applying to return to his Squadron, then on defence duties in northern England, Crook began to familiarise himself with their new fighter: the Spitfire. Soon they were posted to RAF Northolt, and it was at this time...