The inmates of Arkham Asylum have taken over Gotham s detention centre for the criminally insane on April Fool s Day, demanding Batman in exchange for their hostages. Accepting their demented challenge, Batman is forced to endure the personal hells of the Joker, Scarecrow, Poison Ivy, Two-Face and many other sworn enemies in order to save the innocents and retake the prison. During his run through this absurd gauntlet, the Dark Knight s must face down both his most dangerous foes and his inner demons. Written by the legendary writer Grant Morrison (The Green Lantern, Happy!, All-Star Superman) with nightmare inducing art from all time great Dave McKean (The Sandman, Hellblazer) and now a part of DC Black Label, a new publishing imprint which features classic DC characters in all-new, standalone out of continuity stories written and illustrated by world-class authors and artists.