The Batman tie-in tales to the epic ZERO HOUR storylineare now finally collected into one graphic novel in BATMAN: ZERO HOUR! Time is collapsing upon itself! The villainous Extant has ushered in a series ofblack holes that are swallowing the universe, past, present and future! TheBat-family, like everyone else in the DC Universe, has seen time loops affecttheir lives. The result? The return of Barbara Gordon, Batgirl! The Dark Knightstories tying into the classic ZERO HOUR event are now available in theirentirety. Collects BATMAN #0, #511, BATMAN: SHADOW OF THE BAT #0, #31, DETECTIVECOMICS #0, #678, CATWOMAN #0, #74, BATMAN: LEGENDS OF THE DARK KNIGHT #0 andROBIN #0, #10.