Published Sep 1993 by DC.
Direct Edition. 1st appearance of Harley Quinn in a comic book. "Batgirl: Day One." Barbara Gordon attends a costume party dressed as Batgirl. Unfortunately, Poison Ivy and Harley Quinn also decide to show up. Based on Batman The Animated Series. Script by Kelley Puckett, pencils by Mike Parobeck, inks by Rick Burchett. Cover by Parobeck.