Locked in an intergalactic juvenile detention facility, Superboy and Robin meet the youngest-and meanest-Green Lantern ever! Well, sort of a GL. Mostly a GL. Really more of a trainee, but don't tell the bad guys, okay? Plus, Joker Jr. returns.the clown who may be the boys' last, best hope to stop the Gang! Acclaimed writer Peter J. Tomasi (Superman, Detective Comics) and rising artist Carlo Barberi (Super Sons) take you into the past for an action-packed story starring the sons of Superman and Batman! Collecting issues #7-12.