The Tesla Documents — Craig Dirgo

After Nikola Tesla's patents and his road to riches was trampled, he set out to change the rules of the game. What he didn't know was the possible hazards from his experimentation. After triggering one of the worse disasters in U.S. history, Tesla keeps the results of his tests secret. When his diaries are recovered and the cryptic notes revealedâ€"a madman with a secret agenda builds a device to wreak havoc on the world. When what might be man-made tremors strike several locations in the world, anti-terrorism expert John Taft is dispatched by the National Intelligence Agency to investigate. In a world-wide chase to solve the mystery, Taft is led back to the United States and a threat, that if not defused, could plunge the county into the stone age. Will Taft survive a case that baffles everyone until the final seconds? The reluctant but unstoppable hero, John Taft, returns. Originally published as Tremor in 2006, this novel was rewritten and updated.