Superman #6/1973

In "Der gefährlichste Mann der Erde," Batman finds himself bested by two gangsters after a misstep in pursuit, leaving him unconscious and momentarily stripped of his identity. When he regains consciousness, he's shocked to see the face of a small-time criminal staring back at him—his own mask now revealing a stranger’s visage. With his memory clouded and his identity in question, Batman must unravel the mystery before the truth is lost for good. Written by Frank Robbins and illustrated by Bob Brown, with inks by Nick Cardy, the cover by Neal Adams and Murphy Anderson captures the tension perfectly.