The teen superheroes of Young Justice are about to experience their craziest adventures yet. The mysterious organization known only as the Agenda has meddled with the lives of both Young Justice and the team's rival superhero group, Old Justice. Some of the young crime-fighters have become adults, and some of the elderly heroes have turned into teenagers. Will they ever find a way to reverse this madness, or are all of the heroes stuck in their new bodies for good? From author Peter David ( Aquaman ) comes the next collection of Young Justice ! Collects Young Justice #18-19, Young Justice: Sins of Youth #1-2, Young Justice: Sins of Youth Secret Files #1, Superboy #74, Sins of Youth: JLA Jr. #1, Sins of Youth: Aquaboy/Lagoon Man #1, Sins of Youth: Batboy and Robin #1, Sins of Youth: Kid Flash/Impulse #1, Sins of Youth: Starwoman and the JSA Jr. #1, Sins of Youth: Superman Jr./Superboy Sr. #1, Sins of Youth: Wonder Girls #1 and Sins of Youth: The Secrets/Deadboy #1.