The creature called Man-Bat escapes Arkham Asylum with a secret weapon and a sonar shriek that makes citizens turn batty, and it is up to Batman to keep Gotham City from becoming a city of bats. Written in graphic-novel format.
A collection of seven comics featuring Batman and Batgirl fighting villains of Gotham City, including the Joker, Bane, the Penguin, Catwoman, the Riddler, Clayface, and Poison Ivy.