The product is a single issue comic book titled Detective Comics #504, published by DC Comics in 1981. This comic features an appearance by the character Joker, written and illustrated by Jim Starlin. It is a part of the US Comics tradition and belongs to the DC Universe. This first printing from the Copper Age (1984-1991) era is a valuable addition to any comic book collection, especially for fans of the Batman universe and the iconic Joker character.