The product is a lot of four hardcover books from the Killing series by Bill O'Reilly and other authors. The books cover various topics, including the Killing series and books related to Jesus, Patton, and Kennedy. Published by Henry Holt in the United States, these English-language books offer a fascinating insight into history and current events through a gripping storytelling style that is signature to O'Reilly's work. Whether you are a fan of suspenseful narrative or a history buff, this lot of books is sure to captivate and entertain.