From back cover:
The consumate warrior. The man who excels. The supreme master of all the arts who holds the fate of all China in his hands. Jake Maroc is the top agent for the Quarry, the secretive government agency. Nichiren, Jake's sworn enemy is a cold killer with a deadly secret. Shi Zilin is a wily Communist minister, a survivor of eras in turmoil. Four ancient pieces of jade are the key to unlocking the grand scheme of the Jian--with the KGB, Comunnist Chinese, and Americans in deadly battle.