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 think my parents were happy that I'd gone to university and gotten a degree...
Television contracts the imagination and radio expands it.
In intelligence work there are limits to the amount of information one can share. Confidentiality is essential.