Dean Koontz is an American author of suspense, horror, science fiction and fantasy novels. He has sold over 450 million copies of his books worldwide and is one of the world's most popular authors. Koontz's books have been adapted into films, comic books, television series and video games. He is best known for his novel series featuring the character Odd Thomas. DEAN Koontz is a prolific author who has written over 100 novels in his career.