There is lots to like about this book--set in early post WWII West Germany, WF Buckley's Yalie CIA agent, Blackford Oakes is sent as an engineer to a Westerwald aristocrat who wants to restore his family's ancient chapel, down to the exquisite shade of blue of the stained glass windows. Oakes is a smart enough Yalie who studied "some" engineering and had some quick training also in London as a cover before his assignment to the German count, Axel Wintergrin. Besides sparing no expense to restore his family's chapel (his family's own apparently limitless money is supplemented by US government cultural funds), the Count is also leading a movement to reunite Germany, based on his shrewd calculations that the USSR would not invade the West due to Russia's weakened state post WWII.
Wintergrin is the perfect post WWII German. He served in Norway's underground resistance against Hitler Germany, only returning to Germany after the end of WWII. After the War, Wintergrin calls his fellow citizens in Germany to unite and call Russia's bluff. He is brilliant and his speeches and anticipation of the normal sliming tactics of politics are one of the highlights of the book. Stalin is clearly aiming to assassinate Wintergrin, but if it gets out he did it, there could be popular outrage with--we are told-- the people or at least with the military. Stalin demands concerted action with its Cold War enemy--the USA. The "fix" is in--if the two powers cannot find a way to rig the elections and have Wintergrin lose the election, they will have to assassinate Wintergrin.
Buckley writes, from time to time brilliantly and from time to time like an esoteric Crossword afficionado-- hunting for obscure and recondite words. But amidst the silliness of Blackford Oakes--a wannabee Sean Connery--Buckley focuses on the all too real situation where the USA participates in the assassination of a leader who is probably completely right in his calculus of the probabilities that Russia would not intervene militarily if West Germany in 1953 proceeded to push for a genuine fair election to reunite. However, we see the USA agree with Stalin that the risk of further bloodshed however unlikely is not worth it.
Oakes is tasked with completing the "exquisite" restoration of Wintergrin's chapel, and then shooting the Count before he likely wins the general election and replaces Adenauer as PM. The Count has out-tricked the newspapers, the CIA and the KGB--both of which agreed to assassinate the count out of fear that the New Germany will rise again. There follows a lot of double crossing and uncertainty, with everyone playing almost everyone off on each other.
Oakes receives his orders to work with the beautiful Russian spy and is conflicted when he is ordered to kill his German friend. Unsurprisingly, Oakes survives and gets the girl--who works for the Russians. As a weak response, Oakes makes a few speeches to the Russian spy defending the US democratic system against the violent gangster state in Russia--after which he makes wild and passionate love to the Russian anyway--being unfaithful in the process to his girlfriend back home--a pretty unattractive aspect of Oakes' character without his apparently losing much sleep over it.
Despite at times turgid or hypersyllabic prose, smug Yalie poses, and some logical flaws, "Stained Glass" is a pretty good "inside the CIA" spy novel, with smugness balanced against some pretty funny exchanges--intended, I think. Some of the diplomatic bluffing and finessing stated positions, etc, is pretty clever, as when Wintergrin is able to explain why Stalin is bluffing about his stated intent to launch an invasion should Axel win, although the Americans seem nonetheless afraid to challenge their DC based experts and their erstwhile allies in the WWII. The German in the book is also correct, which is not always the case in other spy novels.
Oakes ultimately faces a moral dilemma: he has to choose between (1) his CIA bosses, who seem to be treating him right although they make decisions from afar and without the benefit of real time, or (2) his conscience. Though I think Oakes' ego and flippant selfishness are pretty unattractive, one can't help but root for him, all to a happy if ambiguous end. I liked the book, but would say the smugness and at times needlessly verbose language put the book at 3.4 instead of 3.8.