Book Log 2019 #23 Masyryk Station by David Downing

It's 1948, and postwar Berlin is still unsettled. Still occupied by the four Allied powers, there's a sense that this arrangement can't last much longer, and that if it does collapse it will be in favor of the Soviets. Journalist and spy John Russell continues to play the major powers against each other by working for both the NKVD and the new CIA, trying to keep both at bay while he tries to figure out a way to free himself from both.

Aiding him in this quest is his Soviet handler, who appears to be looking for his own way out. Together they put together a plan where they gain the sort of intelligence that will buy their freedom from one service and the silence of the other. 

This is the last book of the series, and is a fitting finale.