A very quick read - Joker breaks out of Arkham Asylum, causes mayhem and havok, Batman shows up. As part of the graphic novel it also gives an origin story for the Joker (making him more of a tragic character than out-and-out villain) told in flashbacks as part of the story.

Entertaining enough, though ultimately not something that gave me anything other than a fairly bland and blase feeling after reading. The most notable thing about it was that I dug out my old Fire tablet that I had intended to toss into electronic recycling so that I didn't have to read this on the actual Kindle.