Tom Clancy wrote a novel (Jack Ryan) involving a Russian turncoat KGB agent code named “Cardinal”. Can’t recall the title but maybe I’ll skim back through it to see if I can pick anything up.
Caveat: Clancy is one of the reasons why I keep cynical about Q being a LARP. Time will tell.
There are good blogs about the net documenting Q’s authenticity. I was solidly on board way before so much evidence piled up on the positive side about Q.
Cardinal of the Kremlin. Actually my favorite Jack Ryan novel. Hit view replies and didnt see one. Very good book