Written by PETER CALLOWAY. Art by ANDRES GUINALDO & LORENZO RUGGIERO. Cover by GUILLEM MARCH. Harley Quinn back in Arkham Asylum? Can she resist The Joker's manipulations? Can Catwoman and Poison Ivy save their free-spirited friend from herself? Will she make a mistake that ends the Sirens forever? 32 pg, FC. Cover price $2.99.