Given the task definition and input, reply with output. In this task, you are given books product reviews in English language. The goal is to classify the review as "POS" if the overall sentiment of the review is positive or as "NEG" if the overall sentiment of the review is negative.

A True Fire From The Start... . "Shadowfires" was another wonderful book in the long line of great Koontz novels, and this one was no different. We have the story of a woman named Rachel, and her husband, Eric Leben. Eric was a doctor in genetics who was fighting with his wife until he is pushed in front of a bus, by her, and killed. Rachel felt that maybe freedom was at last hers, until hours later, Eric is missing from the morgue, and we learn the awful truth of his secret work. I felt that this book had action from the very first few pages, and did not stop until the very last word. I was thrilled with the roller coaster of a ride that Koontz took me on, and i could not put the book down once i started on the journey. Koontz makes great use of location, and our fears of within, to give us this great chiller of the experiments of man to be more than human. A definite gem in the Koontz collection, a must have for any collector, and a great place to start for anyone taking a look at his work for the first time. A Masterpiece. My only wish of this book: It should have been made into a movie. -C
POS