Assignment Manchurian Doll

Description for ASSIGNMENT MANCHURIAN DOLL by Edward S Aarons: 

His name was Colonel Alexi Kaminov---and if, like Sam Durell, you worked in the secret, silent world of counter-intelligence you would shudder at his name and his grim reputation as a top Russian agent.

Now, suddenly, Kaminov wanted to defect---and Durell was the one man he trusted to get him out of Manchuria.

The big hitch was not that Kaminov was hiding in the midst of an impenetrable Chinese military stronghold---or even that the whole scheme could be a skillful trap.  The big hitch was a wild, tormented beatuy named Nadja.  Without her, Kaminov wouldn't join Durell.  Without her, Durell couldn't find Kaminov.  And yet, by the Colonel's own hand, she'd been trained as the most vicious of all Russian agents---absolutely dedicated---and absolutely deadly...

This is #18 in A Sam Durell Novel.