I’ve finished but didn’t want to post too many spoilers since there are plot twists along the way. I am planning to post my thoughts this weekend. I liked it and plan to read more books by Brian Moore. Therefore the topic accomplished its objective for me by shining the light on a new author.
I was not aware of the use of hostages for proxy activities. There was a very interesting article about it on Wikipedia with several examples from Northern Ireland. When the book was published this concern was a relevant one for people. I suppose that would have made the book even more suspenseful at the time it was published, even though the questions posed are still interesting now in historical retrospect.