Batman/Superman vol.4 TPB

WHO IS SUPERMAN'S JOKER? Someone is targeting the people closest to Superman-those who wear his sigil, those he cares most about, even innocents whose lives he's saved. The attacks seem random, but Batman recognizes the pattern. A madman who hates you so much he strikes at the people around you...this is Superman's Joker. Worse, the method of the attacks is even more bizarre: the bullets leave no residue, no clues, then seem to disappear into nothingness. Even the World's Greatest Detective is at a loss.
But when Batman hatches a plan to draw the killer out of hiding, a crucial clue is uncovered-one that reveals that the killer is more closely tied to Superman than they could have imagined! Can Superman, Batman and Supergirl defeat this threat from Superman's past...or will Superman's Joker prove to be his final undoing? Writer Greg Pak (ACTION COMICS) and artist Ardian Syaf (BATGIRL) add a deadly new name to Superman's rogues gallery...one that will test Superman's strength and Batman's mind equally! Collects BATMAN/SUPERMAN #16-20, BATMAN/SUPERMAN ANNUAL #1 and BATMAN/SUPERMAN: FUTURES END #1!