Batman vol. 4: The War of Jokes and Riddles

The Riddler and The Joker are at war! As the battle rages, the villains of Gotham City are forced to choose side or be caught in the crossfire. As the conflict spreads to every corner of Gotham City, Batman battles back both side's forces, and an unlikely criminal becomes the key to a potential resolution... but is the price of peace too high? Collects BATMAN #25-32.