GALACTIC SECRETS UNLEASHED! While on an exploratory mission of Starbreaker's home planet, Guy Gardner and Jo Mullein stumble onto the legendary, billion-year-old Book of Oa--and are floored when Hal Jordan blazes across its glowing pages. This find isn't just history-making; it could upend the very fabric of the DC Universe and unleash chaos across unknown numbers of galaxies. Meanwhile, Hal's hunt for answers takes him to Star City for a classic team-up with his old pal, Oliver Queen. Not to be outdone, Batman and Barry Allen jump into the action as the mystery deepens. Guided by cryptic visions from the Book of Oa, Hal faces a game-changing decision that could reshape the Green Lantern Corps forever. And don't miss the milestone 600th issue: an oversize celebration loaded with epic stories, legendary creators, and killer new costume designs from superstar artist David Nakayama! Collects GREEN LANTERN #28-33.