Man-Bat's sneak attack!
Billy Matheny, writer
When the lights go out three college students on a visit to Arkham Asylum find themselves trapped by the vicious Man-Bat.

by Bill Matheny, writer (2014)
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. The creature called Man-Bat escapes Arkham Asylum with a secret weapon: a sonar shriek that makes citizens turn "batty." Can Batman keep Gotham City from becoming a "City of Bats"? Book #2
Billy Matheny, writer
When the lights go out three college students on a visit to Arkham Asylum find themselves trapped by the vicious Man-Bat.