Batman Adventures #12 comic book from 1993 is a key issue featuring the first appearance of the iconic character Harley Quinn. The single issue comic, graded CGC 9.4 Near Mint, is a part of the DC Universe and is intended for a general audience. This comic is a valuable addition to any collector's library, showcasing the work of artists and writers such as Mike Parobeck, Kelley Puckett, and Rick Burchett.