You have to go out of your way as a suspense novelist to find situations where the protagonists are somewhat helpless and in real danger.
“I love the idea of spies in love. How would it work between two people who were so programmed to lie and be suspicious, who have a whole life based on pretence?”
“Besides, I think that when one has been through a boarding school, especially then, you have some resistance, because it was both fine comradeship and a fairly hard training.”