I don't inflict horrors on readers.
I don't inflict horrors on readers. In my research, I've uncovered truly terrible documentations of cruelty and torture, but I leave that offstage. I always pull back and let the reader imagine the details. We all know to one degree or another the horrors of war.
For John le Carre, it was always who's betraying who: the hall-of-mirrors kind of thing. When you go back to the '30s, it's a case of good vs. evil, and no kidding. When I have a hero who believes France and Britain are on the right side, a reader is not going to question that.