Lords of the Earth (The Destroyer Book 61)

The Species Liberation Alliance are ecoterrorists, wantonly killing and plotting mayhem in the name of animal justice. Waldron Perriweather III, heir to the great Perriweather fortune, is happy to fund the SLA, and speak on its behalf… but is it part of an even more sinister plan? Perriweather’s captive scientists have bred a simple housefly with a difference: a single bite will turn a nebbish into a neanderthal, powerful but utterly mindless. An animal, zombie killing machine. If unleashed on the world, it has the potential to disrupt the ecological chain and drive mankind to destroy itself. Unless it submits to Perriweather’s dictates.

Remo Williams is The Destroyer, an all-American cop recruited—through highly unorthodox methods—into a secret government law-enforcement organization. Trained in the esoteric martial art of Sinanju by his aged Korean mentor, Chiun, Remo is America's last line of defense against mad scientists, organized crime, ancient undead gods, and anything else that threatens the Constitution. An action-adventure series leavened with social and political satire, the Destroyer novels have been thrilling readers worldwide for decades.