From a top secret government laboratory come two genetically altered life forms. One is a magnificent dog of astonishing intelligence. The other, a hybrid monster of a brutally violent nature. And both are on the loose...

Bestselling author Dean Koontz presents his most terrifying, dramatic and moving novel: The explosive story of a man and a woman, caught in a relentless storm of mankind's darkest creation...

The books of Dean Koontz are published in 38 languages, and worldwide sales top 300 million copies. Eleven of his novels have risen to number one on the New York Times hardcover bestseller list, and several have been adapted into feature films and TV miniseries. Dean and Gerda Koontz live in southern California with their golden retriever, Anna, grand-niece of the famous and beloved Trixie.