You sound like a fellow espionage geek.

Two recommendations.

TURN : George Washington’s Spies. Doesn’t turn away from things like Washington owning slaves and the British freeing them, and it has lots of cute tricks, like a one-man submarine and secret writing on egg shells. AMC show.

Any of the WW2 spy novels by Alan Furst. “Night Soldiers” is about a Bulgarian fisherman whose brother was killed by a Fascist mob. He gets recruited into the KGB and fights in Spain.