Book 4 is coming unglued from the spine as seen in photos. Besides that all the books are in good condition. See photos for exact condition. This product is a lot of three first edition hardcover books from the Percy Jackson & The Olympians series by Rick Riordan. Specifically, the books included are numbers 3, 4, and 5 in the series. These novels are published by Hyperion Books for Children and are intended for young adult readers ages 9-12. Written in English, the books fall under the genre of fantasy and are set in a world where a young boy discovers he is a demigod, the son of a Greek god and a mortal. The first editions come with dust jackets, making them a desirable collectible for fans of the series.