Six years ago, the legend of Batman emerged amid the greatest catastrophe Gotham had ever endured. A maniac calling himself The Riddler shut down all electric power mere days before a terrifying superstorm. But the Dark Knight isn't the only hero to surface during this moment in time known only as the Zero Year! Journey back to the Zero Year to see the early tales of heroes and heroines such as Nightwing, Green Arrow, Batgirl, Superman, Birds of Prey, Catwoman, and more! It collects Batman numbered 24-25, Detective Comics number 25, Batgirl number 25, Batwing number 25, Batwoman number 25, Birds of Prey number 25, Catwoman number 25, The Flash number 25, Green Arrow number 25, Green Lantern Corps number 25, Nightwing number 25, Red Hood and The Outlaws number 25 and Action Comics number 25.