Harley Quinn (2013-2016) #24

Harley�s got an endangered friend to save, but there�s just one problem: she�s got to get through Arkham Asylum first! Unsurprisingly, Harley�s not eager to set foot in the site of some of her darkest hours�and she definitely isn�t ready to face a certain someone who�s laughing at the end of a dark hallway�