Tremor — Craig Dirgo

More than one hundred years ago, inventor Nikola Tesla created a device for transferring electricity without wires. It was supposed to be his greatest triumph. Instead, his invention spawned a nightmare. And the nightmare has returned....

After the National Intelligence Agency tracks unusual surges of electricity emanating from the former Yugoslavia, Special Agent John Taft is dispatched to investigate the phenomenon. He uncovers a conspiracy of terror led by a fanatical Serbian nationalist and powered by a machine capable of targeting any location on the globe -- and causing apocalyptic earthquakes to strike on command,

Now, as the terrorists fell cities at will with their earth-shattering weapon, Taft must fight a battle on dangerous ground, against an unstable foe whose greatest desire is to control the world -- or destroy it.