Ellis Peters's historical detail is very accurate and very minute, and therefore is not only interesting to read but good for an actor to acquire a sense of the period. And the other thing I think is that an actor lives in the land of imagination.
According to Goering and the Luftwaffe High Command, they were supposed to be the fighter elite.
It's all kinds of these profound things crashing on you when your child arrives into the world. It's like you've met your reason to live.

