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.
I would like to mention that I have flown the 262 first in May '43. At this time, the aircraft was completely secret. I first knew of the existence of this aircraft only early in '42 - even in my position. This aircraft didn't have any priority in design or production.