The storyline was surprisingly thin. Being an avid spy fiction reader, I cannot think of a less intricate plot from anything else I've read.
His latest is A Most Wanted Man, and it is up to his usual standards. The enemy now are Islamic radicals, but the operators portrayed here are probably innocent. The man in the middle is trying to develop them as leads into a terrorist network - resources that are badly needed. But he is opposed by those who not interested in anything so subtle - they want to arrest them, using dubious means, and torture them: mainly American operatives.
For some time the "new" view of the war against terrorism was very well described in terms of interdepartmental hastling by incompitent bureaucrats from various agencies. I will leave it to the listener to conclude that in his waning years, the author has taken his political views too far in this editorual piece.