And don't miss guest appearances by Zatanna and Talia al Ghul. Then, The Joker is back in Arkham Asylum and Harley Quinn breaks back in with him - but is she there to stand by him or destroy him? Either way, Poison Ivy and Catwoman must put aside their tumultuous past to help their wayward friend. Guest-starring Clayface and Batman!Collects GOTHAM CITY SIRENS #14-26.