BATMAN: DARK KNIGHT, DARK CITY

In this tale from BATMAN #452-454 and DETECTIVE COMICS #629-633, Batman is led through an urban labyrinth by the Riddler, who seems to have become a monster determined to drive Batman insane. In his quest, the Riddler is working with an occultist who has summoned a demon to stop Batman – but in the process, the Riddler himself is slowly changing into a nightmarish beast!