Cleaning up is dirty business.

Especially when you're Argiss Valance, a ruthless corporate magnate, and you want the world to see you as its ultimate philanthropist...even as you secretly plumb the ocean's depths for the key to immortality. Enter Koalatron, a towering garbage-munching mechanical marvel, the brainchild of Valance's brilliant wife, Deanna, and a cutting edge genius, Dr. Max Shepperton.

When Shepperton goes missing and an unspeakable, relentlessly growing sea-horror rises, Deanna, her journalist half-sister Key Sharlayne and renegade eco-vigilante Jeremiah Savage find themselves in a terrifying showdown between titanic machine and irresistible leviathan: Krakenstein vs. Koalatron!