Gotham City Sirens #20 (2009)

Written by PETER CALLOWAY Art by LEE GARBETT Cover by GUILLEM MARCH With The Joker's return to BATMAN comics in recent months, it was only a matter of time before Harley Quinn took notice. Will she abandon her Sirens and return to the side of her true love? Well, she might not have a choice! And what happens between Selina and Harley when they realize that the objects of their respective affections are mortal enemies?