DETECTIVE COMICS #867
The four-part epic "BATMAN: IMPOSTERS" begins with this thirty-page adventure!A call to arms has gone out through Gotham City, and normal, everyday citizens are being drafted into a bizarre battle. Will they side with vigilante justice or join the cause of chaos and anarchy? Only The Dark Knight can rein in the terror created by the villain known only as The Imposter. But what is The Imposter's true motivation for this gang war — and what's hiding behind his rictus grin? Be here to find out!