Dr. Quake. Number 5 in Series

With the ability to use the awesome destructive power of earthquakes for his own ill-gotten gains, villainous Dr Quake is threatening to unleash devastation on California unless he's paid a king's ransom. He has the technology and California has the fault lines. But while Quake and his lovely assistants may have plate tectonics under their control, Remo and Chiun are two forces of nature they never planned to contend with.
Remo Williams is The Destroyer, an ex-cop who should be dead, but instead fights for the secret government law-enforcement organisation CURE. Trained in the esoteric martial art of Sinanju by his aged mentor, Chiun, Remo is America's last line of defence. Breathlessly action-packed and boasting a winning combination of thrills, humour and mysticism, the Destroyer is one of the bestselling series of all time.