Batman Annual #23
Single DC Comic published September 1999
bagged, not boarded

   When a mysterious new crime boss (secretly one of the Simian Scarlet working for Gorilla Grodd) begins monkeying with the status quo in Blüdhaven, Nightwing and Batman make a deperate effort to uncover his identity. But as they dig deeper into Blüdhaven's underworld, the heroes learn that only they stand between the gang leader and world domination.