Celebrating the 25th anniversary of the time-warping event, this massive collection features collects Action Comics #703, Adventures of Superman #516, Anima #7, Batman #511, Batman: Shadow of the Bat #31, Catwoman #14, Damage #0 and #6, Darkstars #24, Detective Comics #678, The Flash #0 and #94, Green Arrow #90, Green Lantern #0 and #55, Guy Gardner: Warrior #24, Hawkman #13, Justice League America #92, Justice League International #68, Justice League Task Force #16, L.E.G.I.O.N. '94 #70, Legionnaires #18, Legion of Super-Heroes #61, Outsiders #11, Robin #10, Steel #8, Superboy #8, Superman #93, Superman: Man of Steel #0 and #37, Team Titans #24, Valor #23, Zero Hour #4-#0, and Stories from Showcase '94 #8-#10, along with a foreword by Dan Jurgens, afterword by series editor KC Carlson, the Zero Month Sampler and an extensive gallery of promotional and behind-the-scenes material.