Led by the Joker, the inmates have taken over Arkham Asylum, Gotham's mental illness detention center, and are holding the staff hostage. Their demands are many, but one stands out: they want Batman in there with them. Batman takes their challenge to save the hostages, but risks losing his own sanity in the process. Includes the annoted script for the comic and original page layouts.

In addition to the material originally published in 1989, this edition includes the full script with annotations by Grant Morrison, thumbnail layouts by Grant Morrison, original covers by Dave McKean, and an afterword by Karen Berger.

The complete graphic novel -- The original script with annotations by Grant Morrison -- Thumbnail layouts by Grant Morrison -- Afterword by editor Karen Berger -- Original covers by Dave McKean.