Batman #409 1987

Batman #409, published by DC in July 1987, features the conclusion of the "Just Another Kid On Crime Alley!" storyline. In this issue, Batman unknowingly places Jason Todd in Ma Gunn's school, a front for training young criminals. Jason uncovers the school's true purpose and aids Batman in thwarting a heist. Impressed by Jason's courage and actions, Batman makes the pivotal decision to take him on as the new Robin. This issue is highly notable to collectors as it marks the official moment Jason Todd becomes Robin in the Post-Crisis continuity.